Updated on 2025/03/31

写真a

 
IWASAKI Masako
 
Organization
Graduate School of Science Department of Physics Professor
School of Science Department of Physics
Title
Professor
Affiliation
Institute of Science
Affiliation campus
Sugimoto Campus

Position

  • Graduate School of Science Department of Physics 

    Professor  2024.04 - Now

  • School of Science Department of Physics 

    Professor  2024.04 - Now

Degree

  • Ph.D ( Nara Women's University )

  • 修士(理学) ( Nara Women's University )

Research Interests

  • Elementary Particle Experiment

  • Accelerator Physics

  • 機械学習

Research Career

  • 電子・陽電子衝突実験によるフレーバー物理の研究(BelleII実験)

    International Joint Research

    2016.04 - Now 

  • 電子・陽電子衝突実験のための加速器開発(BelleII実験・SuperKEKB加速器)

    超電導磁石開発、加速器制御開発  International Joint Research

    2010.04 - 2016.03 

  • 長基線ニュートリノ振動実験(T2K実験)

    ビームモニター開発、ビームラインシミュレーション開発  International Joint Research

    2002.04 - 2010.03 

  • 電子・陽電子衝突実験によるフレーバー物理の研究(Belle実験)

    B中間子稀崩壊解析、測定器・加速器インターフェース開発  International Joint Research

    2002.04 - 2010.03 

  • 電子・陽電子衝突実験によるフレーバー物理の研究(BaBar実験)

    B中間子稀崩壊解析、μ粒子検出器開発  International Joint Research

    2000.04 - 2002.03 

  • 線形加速器実験計画(ILC実験計画)

    トップクォークの物理、電磁カロリメータ開発  International Joint Research

    1996.11 - 2002.03 

  • 電子・陽電子衝突実験による電弱相互作用の研究(SLD実験)

    Parity-Violating parameter の決定、Heavy Flavor 識別、ルミノシティモニターの開発  International Joint Research

    1996.11 - 2002.03 

  • 電子・陽電子衝突実験による二光子物理の研究(TOPAZ実験)

    二光子反応におけるハドロン生成  International Joint Research

    1993.04 - 1996.03 

Professional Memberships

  • 低温工学・超電導学会

      Domestic

  • 日本加速器学会

      Domestic

  • 日本物理学会

      Domestic

Committee Memberships (off-campus)

  • 日本物理学会 第79期ダイバーシティ推進委員会   一般社団法人日本物理学会  

    2023.04 - 2024.03 

  • 招聘研究員   大阪大学  

    2023.03 - 2023.08 

  • 日本物理学会 第78期男女共同参画推進委員会   一般社団法人日本物理学会  

    2022.04 - 2023.03 

  • 将来計画検討委員会 委員   高エネルギー物理学研究者会議  

    2021.10 - 2023.12 

  • 会誌編集委員   日本物理学会  

    2008.09 - 2010.08 

  • 領域世話人(運営委員)   日本物理学会  

    2006.11 - 2007.10 

▼display all

Job Career (off-campus)

  • University of Tokyo   International Center for Elementary Particle Physics   Visiting Professor

    2024.04 - Now

  • Osaka University   Research Center for Nuclear Physics   Specially Appointed Professor

    2023.09 - Now

  • Osaka University   Institute for Datability Science   Visiting Professor

    2023.05 - Now

  • Osaka University   Research Center for Nuclear Physics   Visiting Professor

    2023.04 - 2023.08

  • Osaka University   Research Center for Nuclear Physics   Visiting Associate Professor

    2023.03

  • Osaka University   Institute for Datability Science   Specially Appointed Associate Professor

    2019.04 - 2023.02

  • Osaka University   Research Center for Nuclear Physics   Specially Appointed Associate Professor

    2018.03 - 2023.02

  • High Energy Accelerator Research Organization (KEK)   Associate Professor

    2010.04 - 2016.03

  • University of Tokyo   Graduate School of Science   Assistant Professor

    2004.04 - 2010.03

  • University of Tokyo   International Center for Elementary Particle Physics   Research Associate

    2002.04 - 2004.03

  • University of Oregon   Research Associate

    1997 - 2002

  • Stanford Linear Accelerator Center (SLAC)   Visiting Postdoctoral Fellow

    1997

  • High Energy Accelerator Research Organization (KEK)   Researcher

    1996 - 1997

▼display all

Education

  • Nara Women's University   Doctor's Course   Graduated/Completed

    1993.04 - 1996.03

  • Nara Women's University   Master's Course   Graduated/Completed

    1991.04 - 1993.03

  • Nara Women's University     Graduated/Completed

    1987.04 - 1991.03

Papers

  • Evidence of the P_ccbars(4459)0 in Upsilon(1S, 2S) inclusive decays at Belle Reviewed International coauthorship

    I. Adachi et al. [Belle Collaboration]

    2025.02

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Measurement of $B^+\to\tau^+\nu_\tau$ branching fraction with a hadronic tagging method at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    2025.02

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Observation of Ω(2012)<sup>−</sup>→Ξ(1530)K¯ and measurement of the effective couplings of Ω(2012)<sup>−</sup> to Ξ(1530)K¯ and ΞK¯ Reviewed International coauthorship

    S. Jia, C. P. Shen, C. Z. Yuan et al. [Belle Collaboration]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   860   2025.01( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Using ϒ(1S), ϒ(2S), and ϒ(3S) data collected by the Belle detector, we discover a new three-body decay, Ω(2012)−→Ξ(1530)K¯→ΞπK¯, with a significance of 5.2 σ. The mass of the Ω(2012)− is (2012.5±0.7±0.5) MeV and its effective couplings to Ξ(1530)K¯ and ΞK¯ are (39−39+31±9)×10−2 and (1.7±0.3±0.3)×10−2, where the first uncertainties are statistical and the second are systematic. The ratio of the branching fraction for the three-body decay to that for the two-body decay to ΞK¯ is 0.99±0.26±0.06, assuming isospin symmetry.

    DOI: 10.1016/j.physletb.2024.139224

  • Measurement of the branching fraction and $\it CP$-violating asymmetry of the decay $B^{0} \rightarrow \pi^{0} \pi^{0}$ using $387$ million bottom-antibottom meson pairs in Belle II data Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    2024.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Measurement of the branching fraction, polarization, and time-dependent $CP$ asymmetry in $B^0 \to \rho^+\rho^-$ decays and constraint on the CKM angle $\phi_2$ International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    2024.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Observation of the decay $B^0 \to J/\psi \omega$ at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   111 ( 3 )   032012 - 032012   2024.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.111.032012

  • Observations of the singly Cabibbo-suppressed decays $\Xi_c^{+} \to pK_{S}^{0}$, $\Xi_c^+ \to \Lambda \pi^+$, and $\Xi_c^+ \to \Sigma^{0} \pi^+$ at Belle and Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    JHEP   03   061 - 061   2024.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP03(2025)061

  • Search for lepton flavor-violating decay modes $B^0\to K_S^0\tau^\pm\ell^\mp~(\ell=\mu, e)$ with hadronic $B$-tagging at Belle and Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    2024.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Measurement of $B \to K{}^{*}(892)\gamma$ decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    2024.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Measurement of the inclusive branching fractions for $B_s^0$ decays into $D$ mesons via hadronic tagging Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    2024.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Production cross sections of light and charmed mesons in $e^+e^-$ annihilation near 10.58 GeV Reviewed International coauthorship

    R. Seidl et al. [Belle Collaboration]

    Phys.Rev.D   111 ( 5 )   052003 - 052003   2024.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.111.052003

  • Measurement of the energy dependence of the e$^{+}$e$^{−}$→$ B\overline{B} $, $ B{\overline{B } }^{\ast } $, and $ {B}^{\ast }{\overline{B } }^{\ast } $ cross sections at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    JHEP   10   114 - 114   2024.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP10(2024)114

  • Measurements of the branching fractions of $ {\Xi}_c^0\to {\Xi}^0{\pi}^0 $, $ {\Xi}_c^0\to {\Xi}^0\eta $, and $ {\Xi}_c^0\to {\Xi}^0{\eta}^{\prime } $ and asymmetry parameter of $ {\Xi}_c^0\to {\Xi}^0{\pi}^0 $ Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    JHEP   10   045 - 045   2024.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP10(2024)045

  • Search for $h_b(2P)\to\gamma\chi_{bJ}(1P)$ at $\sqrt{s} = 10.860$ GeV International coauthorship

    A. Boschetti, R. Mussa, U. Tamponi et al. [Belle Collaboration]

    2024.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Measurement of the time-integrated CP asymmetry in $D^{0}\rightarrow K^{0}_{S}K^{0}_{S}$ decays using Belle and Belle II data Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    Phys.Rev.D   111 ( 1 )   012015 - 012015   2024.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.111.012015

  • Model-independent measurement of $D^0$-$\overline{D}{}^0$ mixing parameters in $D^0\rightarrow K^0_{S}\pi^+\pi^-$ decays at Belle and Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    2024.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Observation of time-dependent $CP$ violation and measurement of the branching fraction of $B^0 \to J/\psi \pi^0$ decays Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   111 ( 1 )   012011 - 012011   2024.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.111.012011

  • Search for lepton-flavor-violating τ$^{−}$→ μ$^{−}$μ$^{+}$μ$^{−}$ decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    JHEP   09   062 - 062   2024.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP09(2024)062

  • Search for Rare b→dℓ$^{+}$ℓ$^{−}$ Transitions at Belle Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    Phys.Rev.Lett.   133 ( 10 )   101804 - 101804   2024.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.133.101804

  • Search for $C\!P$ violation in $D^+_{(s)}\to{}K_{S}^{0}K^{-}\pi^{+}\pi^{+}$ decays using triple and quadruple products Reviewed International coauthorship

    L. Aggarwal et al. [Belle and Belle II Collaborations]

    2024.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Test of light-lepton universality in τ decays with the Belle II experiment Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    JHEP   08   205 - 205   2024.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP08(2024)205

  • Measurement of the branching fractions of $ \overline{B} $ → D$^{(*)}$K$^{−} {K}_{(S)}^{\left(\ast \right)0} $ and $ \overline{B} $ → D$^{(*)} {D}_s^{-} $ decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    JHEP   08   206 - 206   2024.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP08(2024)206

  • Search for two-body <math display="inline"><mi>B</mi></math> meson decays to <math display="inline"><mrow><msup><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> and <math display="inline"><mrow><msubsup><mrow><mi mathvariant="normal">Ω</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo stretchy="false">(</mo><mo>*</mo><mo stretchy="false">)</mo><mn>0</mn></mrow></msubsup></mrow></math> Reviewed International coauthorship

    V. Savinov et al. [Belle Collaboration]

    Phys.Rev.D   110 ( 3 )   2024.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.110.L031102

  • Search for charmed baryons in the Λc+ η system and measurement of the branching fractions of Λc (2880)+ and Λc (2940)+ decaying to Λc+ η and pD0 relative to ςc (2455)π Reviewed International coauthorship

    S. X. Li, C. P. Shen et al. [Belle Collaboration]

    Physical Review D   110 ( 3 )   2024.08( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We search for excited charmed baryons in the Λc+η system using a data sample corresponding to an integrated luminosity of 980 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric-energy collider. No significant signals are found in the Λc+η mass spectrum, including the known Λc(2880)+ and Λc(2940)+. Clear Λc(2880)+ and Λc(2940)+ signals are observed in the pD0 mass spectrum. We set upper limits at 90% credibility level on ratios of branching fractions of Λc(2880)+ and Λc(2940)+ decaying to Λc+η relative to ςc(2455)π of <0.13 for the Λc(2880)+ and <1.11 for the Λc(2940)+. We measure ratios of branching fractions of Λc(2880)+ and Λc(2940)+ decaying to pD0 relative to ςc(2455)π of 0.75±0.03(stat)±0.07(syst) for the Λc(2880)+ and 3.59±0.21(stat)±0.56(syst) for the Λc(2940)+.

    DOI: 10.1103/PhysRevD.110.032021

  • Search for the decay <math display="inline"><msup><mi>B</mi><mn>0</mn></msup><mo stretchy="false">→</mo><mi>γ</mi><mi>γ</mi></math> using Belle and Belle II data Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    Phys.Rev.D   110 ( 3 )   2024.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.110.L031106

  • A new graph-neural-network flavor tagger for Belle II and measurement of $\sin2\phi_1$ in $B^0 \to J/\psi K^0_\text{S}$ decays Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   110 ( 1 )   012001 - 012001   2024.07( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral B mesons produced in ϒ(4S) decays. It improves previous algorithms by using the information from all charged final-state particles and the relations between them. We evaluate its performance using B decays to flavor-specific hadronic final states reconstructed in a 362  fb−1 sample of electron-positron collisions collected at the ϒ(4S) resonance with the Belle II detector at the SuperKEKB collider. We achieve an effective tagging efficiency of (37.40±0.43±0.36%), where the first uncertainty is statistical and the second systematic, which is 18% better than the previous Belle II algorithm. Demonstrating the algorithm, we use B0→J/ψKS0 decays to measure the mixing-induced and direct CP violation parameters, S=(0.724±0.035±0.009) and C=(−0.035±0.026±0.029).

    Published by the American Physical Society 2024

    DOI: 10.1103/physrevd.110.012001

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.110.012001/fulltext

  • Search for the baryon number and lepton number violating decays $\tau^-\to \Lambda\pi^-$ and $\tau^-\to \bar{\Lambda}\pi^-$ at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   110 ( 11 )   112003 - 112003   2024.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.110.112003

  • Determination of $|V_{ub}|$ from simultaneous measurements of untagged $B^0\to\pi^- \ell^+ \nu_{\ell}$ and $B^+\to\rho^0 \ell^+\nu_{\ell}$ decays Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    2024.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Evidence of $h_{b}(\text{2P}) \to \Upsilon(\text{1S})\eta$ decay and search for $h_{b}(\text{1P,2P}) \to \Upsilon(\text{1S})\pi^0$ with the Belle detector Reviewed International coauthorship

    E. Kovalenko et al. [Belle Collaboration]

    Phys.Rev.Lett.   133 ( 26 )   261901 - 261901   2024.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.133.261901

  • Measurement of $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.Lett.   134 ( 1 )   011802 - 011802   2024.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.134.011802

  • Measurement of branching fractions, CP asymmetry, and isospin asymmetry for $\boldsymbol{B\rightarrow\rho\gamma}$ decays using Belle and Belle II data Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    2024.07

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  • Measurement of the integrated luminosity of data samples collected during 2019-2022 by the Belle II experiment Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Chin.Phys.C   49 ( 1 )   013001 - 013001   2024.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1088/1674-1137/ad806c

  • Measurement of the branching fraction of the decay $B^− \to D^0 \rho(770)^−$ at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   109 ( 11 )   2024.06( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We measure the branching fraction of the decay B−→D0ρ(770)− using data collected with the Belle II detector. The data contain 387 million BB¯ pairs produced in e+e− collisions at the ϒ(4S) resonance. We reconstruct 8360±180 decays from an analysis of the distributions of the B− energy and the ρ(770)− helicity angle. We determine the branching fraction to be (0.939±0.021(stat)±0.050(syst))%, in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two.

    Published by the American Physical Society 2024

    DOI: 10.1103/physrevd.109.l111103

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.L111103/fulltext

  • Search for a $\mu^+\mu^-$ resonance in four-muon final states at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   109 ( 11 )   2024.06( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We report on a search for a resonance X decaying to a pair of muons in e+e−→μ+μ−X events in the 0.212–9.000  GeV/c2 mass range, using 178  fb−1 of data collected by the Belle II experiment at the SuperKEKB collider at a center of mass energy of 10.58 GeV. The analysis probes two different models of X beyond the standard model: a Z′ vector boson in the Lμ−Lτ model and a muonphilic scalar. We observe no evidence for a signal and set exclusion limits at the 90% confidence level on the products of cross section and branching fraction for these processes, ranging from 0.046 fb to 0.97 fb for the Lμ−Lτ model and from 0.055 fb to 1.3 fb for the muonphilic scalar model. For masses below 6  GeV/c2, the corresponding constraints on the couplings of these processes to the standard model range from 0.0008 to 0.039 for the Lμ−Lτ model and from 0.0018 to 0.040 for the muonphilic scalar model. These are the first constraints on the muonphilic scalar from a dedicated search.

    Published by the American Physical Society 2024

    DOI: 10.1103/physrevd.109.112015

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.112015/fulltext

  • Search for a heavy neutral lepton that mixes predominantly with the tau neutrino Reviewed International coauthorship

    M. Nayak, S. Dey, A. Soffer et al. [Belle Collaboration]

    Physical Review D   109 ( 11 )   2024.06( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We report a search for a heavy neutral lepton (HNL) that mixes predominantly with ντ. The search utilizes data collected with the Belle detector at the KEKB asymmetric energy e+e− collider. The data sample was collected at and just below the center-of-mass energies of the ϒ(4S) and ϒ(5S) resonances and has an integrated luminosity of 915  fb−1, corresponding to (836±12)×106 e+e−→τ+τ− events. We search for production of the HNL (denoted N) in the decay τ−→π−N followed by its decay via N→μ+μ−ντ. The search focuses on the parameter-space region in which the HNL is long-lived, so that the μ+μ− originate from a common vertex that is significantly displaced from the collision point of the KEKB beams. Consistent with the expected background yield, one event is observed in the data sample after application of all the event-selection criteria. We report limits on the mixing parameter of the HNL with the τ neutrino as a function of the HNL mass.

    Published by the American Physical Society 2024

    DOI: 10.1103/physrevd.109.l111102

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.L111102/fulltext

  • Evidence for $B^{+}\to K^{+}\nu\bar{\nu}$ Decays Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   109 ( 11 )   2024.06( ISSN:2470-0010 ( eISSN:2470-0029

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    We search for the rare decay B+→K+νν¯ in a 362  fb−1 sample of electron-positron collisions at the ϒ(4S) resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying B meson in ϒ(4S)→BB¯ events to suppress background from other decays of the signal B candidate and light-quark pair production. We validate the measurement with an auxiliary analysis based on a conventional hadronic reconstruction of the accompanying B meson. For background suppression, we exploit distinct signal features using machine learning methods tuned with simulated data. The signal-reconstruction efficiency and background suppression are validated through various control channels. The branching fraction is extracted in a maximum likelihood fit. Our inclusive and hadronic analyses yield consistent results for the B+→K+νν¯ branching fraction of [2.7±0.5(stat)±0.5(syst)]×10−5 and [1.1−0.8+0.9(stat)−0.5+0.8(syst)]×10−5, respectively. Combining the results, we determine the branching fraction of the decay B+→K+νν¯ to be [2.3±0.5(stat)−0.4+0.5(syst)]×10−5, providing the first evidence for this decay at 3.5 standard deviations. The combined result is 2.7 standard deviations above the standard model expectation.

    Published by the American Physical Society 2024

    DOI: 10.1103/physrevd.109.112006

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.112006/fulltext

  • Study of $\chi_{bJ}(2P)\to\omega\Upsilon(1S)$ at Belle International coauthorship

    Z.S. Stottler, T.K. Pedlar, B.G. Fulsom et al. [Belle Collaboration]

    2024.06

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  • First measurement of $R(X_{\tau/\ell})$ as an inclusive test of the $b \to c \tau \nu$ anomaly Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review Letters   132 ( 21 )   211804 - 211804   2024.05( ISSN:0031-9007 ( eISSN:1079-7114

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    We measure the tau-to-light-lepton ratio of inclusive B-meson branching fractions R(Xτ/ℓ)≡B(B→Xτν)/B(B→Xℓν), where ℓ indicates an electron or muon, and thereby test the universality of charged-current weak interactions. We select events that have one fully reconstructed B meson and a charged lepton candidate from 189  fb−1 of electron-positron collision data collected with the Belle II detector. We find R(Xτ/ℓ)=0.228±0.016(stat)±0.036(syst), in agreement with standard-model expectations. This is the first direct measurement of R(Xτ/ℓ).

    Published by the American Physical Society 2024

    DOI: 10.1103/physrevlett.132.211804

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.132.211804/fulltext

  • Measurement of branching-fraction ratios and $CP$ asymmetries in $B^{\pm} \to D_{CP\pm}K^{\pm}$ decays at Belle and Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    Journal of High Energy Physics   2024 ( 5 )   2024.05( eISSN:1029-8479

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    Abstract

    We report results from a study of B<sup>±</sup>→ DK<sup>±</sup> decays followed by D decaying to the CP-even final state K<sup>+</sup>K<sup>−</sup> and CP-odd final state $$ {K}_S^0{\pi}^0 $$, where D is an admixture of D<sup>0</sup> and $$ {\overline{D } }^0 $$ states. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity-triangle angle ϕ<sub>3</sub>. The results are based on a combined analysis of the final data set of 772 × 10<sup>6</sup>$$ B\overline{B} $$ pairs collected by the Belle experiment and a data set of 198 × 10<sup>6</sup>$$ B\overline{B} $$ pairs collected by the Belle II experiment, both in electron-positron collisions at the Υ(4S) resonance. We measure the CP asymmetries to be $$ \mathcal{A} $$<sub>CP+</sub> = (+12.5 ± 5.8 ± 1.4)% and $$ \mathcal{A} $$<sub>CP−</sub> = (−16.7 ± 5.7 ± 0.6)%, and the ratios of branching fractions to be $$ \mathcal{R} $$<sub>CP+</sub> = 1.164 ± 0.081 ± 0.036 and $$ \mathcal{R} $$<sub>CP−</sub> = 1.151 ± 0.074 ± 0.019. The first contribution to the uncertainties is statistical, and the second is systematic. The asymmetries $$ \mathcal{A} $$<sub>CP+</sub> and $$ \mathcal{A} $$<sub>CP−</sub> have similar magnitudes and opposite signs; their difference corresponds to 3.5 standard deviations. From these values we calculate 68.3% confidence intervals of (8.5<sup>°</sup> &lt; ϕ<sub>3</sub> &lt; 16.5<sup>°</sup>) or (84.5<sup>°</sup> &lt; ϕ<sub>3</sub> &lt; 95.5<sup>°</sup>) or (163.3<sup>°</sup> &lt; ϕ<sub>3</sub> &lt; 171.5<sup>°</sup>) and 0.321 &lt; r<sub>B</sub> &lt; 0.465.

    DOI: 10.1007/jhep05(2024)212

    Other URL: https://link.springer.com/article/10.1007/JHEP05(2024)212/fulltext.html

  • Search for the $e^+e^-\to\eta_{b}(1S)\omega$ and $e^+e^-\to\chi_{b0}(1P)\omega$ processes at $\sqrt{s}=10.745\,\mathrm{GeV}$ Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   109 ( 7 )   2024.04( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.109.072013

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.072013/fulltext

  • Determination of the CKM angle $\phi_{3}$ from a combination of Belle and Belle II results Reviewed International coauthorship

    I. Adachi et al. [Belle and Belle II Collaborations]

    JHEP   10   143 - 143   2024.04

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    DOI: 10.1007/JHEP10(2024)143

  • Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 GeV at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   110 ( 11 )   112005 - 112005   2024.04

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    DOI: 10.1103/PhysRevD.110.112005

  • Search for the semileptonic decays $\Xi_c^0 \to \Xi^0\ell^+\ell^-$ at Belle Reviewed International coauthorship

    J. X. Cui, Y. B. Li, C. P. Shen et al. [Belle Collaboration]

    Physical Review D   109 ( 5 )   2024.03( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.109.052003

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.052003/fulltext

  • Angular analysis of $B \to K^* e^+ e^-$ in the low-$q^2$ region with new electron identification at Belle Reviewed International coauthorship

    D. Ferlewicz, P. Urquijo et. al. [Belle Collaboration]

    Phys.Rev.D   110 ( 7 )   072005 - 072005   2024.03

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    DOI: 10.1103/PhysRevD.110.072005

  • Measurement of $CP$ asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   109 ( 11 )   112020 - 112020   2024.03

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    DOI: 10.1103/PhysRevD.109.112020

  • Search for a pentaquark state decaying into $pJ/\psi$ in $\Upsilon(1,2S)$ inclusive decays at Belle International coauthorship

    X. Dong, H.Y. Zhang, X.L. Wang et al. [Belle Collaboration]

    2024.03

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  • Search for charged-lepton flavor violation in $\Upsilon(2S) \to \ell^\mp\tau^\pm$ ($\ell=e,\mu$) decays at Belle Reviewed International coauthorship

    R. Dhamija, S. Nishida, A. Giri et al. [Belle Collaboration]

    Journal of High Energy Physics   2024 ( 2 )   2024.02( eISSN:1029-8479

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Abstract

    We report a search for the charged-lepton flavor violation in Υ(2S) → ℓ<sup>∓</sup>τ<sup>±</sup> (ℓ = e, μ) decays using a 25 fb<sup>−1</sup> Υ(2S) sample collected by the Belle detector at the KEKB e<sup>+</sup>e<sup>−</sup> asymmetric-energy collider. We find no evidence for a signal and set upper limits on the branching fractions ($$ \mathcal{B} $$) at 90% confidence level. We obtain the most stringent upper limits: $$ \mathcal{B} $$(Υ(2S) → μ<sup>∓</sup>τ<sup>±</sup>) &lt; 0.23 × 10<sup>−6</sup> and $$ \mathcal{B} $$(Υ(2S) → e<sup>∓</sup>τ<sup>±</sup>) &lt; 1.12 × 10<sup>−6</sup>.

    DOI: 10.1007/jhep02(2024)187

    Other URL: https://link.springer.com/article/10.1007/JHEP02(2024)187/fulltext.html

  • Search for the decay $B_s^0\to J/\psi\pi^0$ at Belle experiment Reviewed International coauthorship

    D. Kumar, B. Bhuyan et al. [Belle Collaboration]

    Physical Review D   109 ( 3 )   2024.02( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.109.032007

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.032007/fulltext

  • Search for baryon and lepton number violating decays $\boldsymbol{D \rightarrow p\ell}$ Reviewed International coauthorship

    S. Maity, R. Garg, S. Bahinipati, V. Bhardwaj et al. [Belle Collaboration]

    Physical Review D   109 ( 3 )   2024.02( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.109.l031101

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.L031101/fulltext

  • Search for a dark leptophilic scalar produced in association with $\tau^+\tau^-$ pair in $e^+e^-$ annihilation at center-of-mass energies near 10.58 GeV Reviewed International coauthorship

    D. Biswas, Sw. Banerjee et al. [Belle Collaboration]

    Physical Review D   109 ( 3 )   2024.02( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.109.032002

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.032002/fulltext

  • Measurement of $CP$ asymmetries in $B^0\to\eta'K^0_s$ decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   110 ( 11 )   112002 - 112002   2024.02

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    DOI: 10.1103/PhysRevD.110.112002

  • Measurement of branching fractions and direct $CP$ asymmetries for $B \to K\pi$ and $B\to\pi\pi$ decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   109 ( 1 )   2024.01( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.109.012001

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.012001/fulltext

  • Study of $\Upsilon(10753)$ decays to $\pi^{+}\pi^{-}\Upsilon(nS)$ final states at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    JHEP   07   116 - 116   2024.01

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    DOI: 10.1007/JHEP07(2024)116

  • A test of lepton flavor universality with a measurement of $R(D^{*})$ using hadronic $B$ tagging at the Belle II experiment Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   110 ( 7 )   072020 - 072020   2024.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.110.072020

  • Measurements of the branching fraction, polarization, and $CP$ asymmetry for the decay $B^0\rightarrow \omega \omega$ Reviewed International coauthorship

    Y. Guan, A. Schwartz, K. Kinoshita et al. [Belle Collaboration]

    Phys.Rev.Lett.   133 ( 8 )   081801 - 081801   2024.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.133.081801

  • Search for Baryon-Number-Violating Processes in $B^-$ Decays to the $\bar{\Xi}_{c}^{0} \bar{\Lambda}_{c}^{-}$ Final State Reviewed International coauthorship

    T. Gu, V. Savinov et al. [Belle Collaboration]

    Phys.Rev.Lett.   133 ( 7 )   071802 - 071802   2024.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.133.071802

  • Observation of charmed strange meson pair production in $\Upsilon(2S)$ decays and in $e^{+}e^{-}$ annihilation at $\sqrt{s} = 10.52~ \rm{GeV}$ Reviewed International coauthorship

    B. S. Gao, W. J. Zhu, X. L. Wang et al. [Belle Collaboration]

    Physical Review D   108 ( 11 )   2023.12( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.112015

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.112015/fulltext

  • Search for a long-lived spin-0 mediator in $b\to s$ transitions at the Belle II experiment Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   108 ( 11 )   2023.12( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.l111104

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.L111104/fulltext

  • Search for $CP$ violation in $D^{+}_{(s)}\rightarrow K^{+}K^{0}_{S}h^{+}h^{-}$$(h=K,\pi)$ decays and observation of the Cabibbo-suppressed decay $D^{+}_{s}\rightarrow K^{+}K^{-}K^{0}_{S}\pi^{+}$ Reviewed International coauthorship

    H. K. Moon, E. Won et al. [Belle Collaboration]

    Physical Review D   108 ( 11 )   2023.12( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.l111102

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.L111102/fulltext

  • Study of $B^+ \rightarrow p \overline{n} \pi^0$ Reviewed International coauthorship

    K.-N. Chu, Y.-R. Lin, M.-Z. Wang et al. [Belle Collaboration]

    Physical Review D   108 ( 11 )   2023.12( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.112007

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.112007/fulltext

  • Determination of $|V_{cb}|$ using $\bar{B}^0 \to D^{\ast+} l^− \bar{\nu}_l$ decays with Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   108 ( 9 )   092013 - 092013   2023.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.108.092013

  • Search for a Heavy Neutrino in <math display="inline"><mi>τ</mi></math> Decays at Belle Reviewed International coauthorship

    D. Liventsev et al. [Belle Collaboration]

    Phys.Rev.Lett.   131 ( 21 )   211802 - 211802   2023.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.131.211802

  • First Simultaneous Determination of Inclusive and Exclusive $|V_{ub}|$ Reviewed International coauthorship

    L. Cao, F. Bernlochner, K. Tackmann et al. [Belle Collaboration]

    Phys.Rev.Lett.   131 ( 21 )   211801 - 211801   2023.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.131.211801

  • Measurement of the Ratio of Partial Branching Fractions of Inclusive $\overline{B} \to X_u \ell \overline{\nu}$ to $\overline{B} \to X_{c} \ell \overline{\nu}$ and the Ratio of their Spectra with Hadronic Tagging International coauthorship

    M. Hohmann, P. Urquijo et al. [Belle Collaboration]

    2023.11

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  • Tests of light-lepton universality in angular asymmetries of $B^0 \to D^{∗−}l\nu$ decays Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.Lett.   131 ( 18 )   181801 - 181801   2023.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.131.181801

  • Precise measurement of the $D_s^+$ lifetime at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review Letters   131 ( 17 )   2023.10( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevlett.131.171803

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.131.171803/fulltext

  • Measurement of $𝐶⁢𝑃$ asymmetries in $𝐵^0 \to \phi ⁢𝐾^0_𝑠$ decays with Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Phys.Rev.D   108 ( 7 )   072012 - 072012   2023.10

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    DOI: 10.1103/PhysRevD.108.072012

  • Measurement of Angular Coefficients of $\bar{B} \to D^* \ell \bar{\nu}_\ell$: Implications for $|V_{cb}|$ and Tests of Lepton Flavor Universality Reviewed International coauthorship

    M.T. Prim, F. Bernlochner, F. Metzner et al. [Belle Collaboration]

    Phys.Rev.Lett.   133 ( 13 )   131801 - 131801   2023.10

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    DOI: 10.1103/PhysRevLett.133.131801

  • Evidence for $𝐵^0 \to 𝑝 \bar{\Sigma^0 \pi^-}⁢ at Belle Reviewed International coauthorship

    C.-Y. Chang, M.-Z. Wang et al. [Belle Collaboration]

    Physical Review D   108 ( 5 )   2023.09( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.052011

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.052011/fulltext

  • Search for a $\tau^+\tau^-$ resonance in $e^{+}e^{-}\rightarrow \mu^{+}\mu^{-} \tau^+\tau^-$ events with the Belle II experiment Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review Letters   131 ( 12 )   2023.09( ISSN:0031-9007 ( eISSN:1079-7114

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    DOI: 10.1103/physrevlett.131.121802

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.131.121802/fulltext

  • Measurement of CP asymmetries and branching-fraction ratios for B$^{±}$→ DK$^{±}$ and Dπ$^{±}$ with D →$ {K}_{\textrm{S } }^0 $K$^{±}$π$^{∓}$ using Belle and Belle II data Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Journal of High Energy Physics   2023 ( 9 )   2023.09( eISSN:1029-8479

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    Abstract

    We measure CP asymmetries and branching-fraction ratios for B<sup>±</sup>→ DK<sup>±</sup> and Dπ<sup>±</sup> decays with D →$$ {K}_{\textrm{S } }^0 $$K<sup>±</sup>π<sup>∓</sup>, where D is a superposition of D<sup>0</sup> and $$ \overline{D} $$<sup>0</sup>. We use the full data set of the Belle experiment, containing 772 × 10<sup>6</sup>$$ B\overline{B} $$ pairs, and data from the Belle II experiment, containing 387 × 10<sup>6</sup>$$ B\overline{B} $$ pairs, both collected in electron-positron collisions at the Υ(4S) resonance. Our results provide model-independent information on the unitarity triangle angle ϕ<sub>3</sub>.

    DOI: 10.1007/jhep09(2023)146

    Other URL: https://link.springer.com/article/10.1007/JHEP09(2023)146/fulltext.html

  • Measurement of $𝐶⁢𝑃$ Violation in $𝐵^0 \to 𝐾^0_𝑆 \pi⁢^0$ Decays at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review Letters   131 ( 11 )   2023.09( ISSN:0031-9007 ( eISSN:1079-7114

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    DOI: 10.1103/physrevlett.131.111803

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.131.111803/fulltext

  • Search for $ {\textrm{B } }_{\textrm{s } }^0 $→ ℓ$^{∓}$τ$^{±}$ with the semi-leptonic tagging method at Belle Reviewed International coauthorship

    L. Nayak, S. Nishida, A. Giri et al. [Belle Collaboration]

    Journal of High Energy Physics   2023 ( 8 )   2023.08( eISSN:1029-8479

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    Abstract

    We present a search for the lepton-flavor-violating decays $$ {B}_s^0 $$ → ℓ<sup>∓</sup>τ<sup>±</sup>, where ℓ = e, μ, using the full data sample of 121 fb<sup>−1</sup> collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e<sup>+</sup>e<sup>−</sup> collider. We use $$ {B}_s^0{\overline{B } }_s^0 $$ events in which one $$ {B}_s^0 $$ meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for $$ {B}_s^0 $$→ ℓ<sup>∓</sup>τ<sup>±</sup> decays and set upper limits on their branching fractions at 90% confidence level as $$ \mathcal{B} $$($$ {B}_s^0 $$→ e<sup>∓</sup>τ<sup>±</sup>) &lt; 14 × 10<sup>−4</sup> and $$ \mathcal{B} $$($$ {B}_s^0 $$→ μ<sup>∓</sup>τ<sup>±</sup>) &lt; 7.3 × 10<sup>−4</sup>. Our result represents the first upper limit on the $$ {B}_s^0 $$→ e<sup>∓</sup>τ<sup>±</sup> decay rate.

    DOI: 10.1007/jhep08(2023)178

    Other URL: https://link.springer.com/article/10.1007/JHEP08(2023)178/fulltext.html

  • Measurement of the e$^{+}$e$^{−}$→$ {B}_s^0{\overline{B } }_s^0X $ cross section in the energy range from 10.63 to 11.02 GeV using inclusive $ {D}_s^{+} $ and D$^{0}$ production Reviewed International coauthorship

    V. Zhukova, R. Mizuk et al. [Belle Collaboration]

    Journal of High Energy Physics   2023 ( 8 )   2023.08( eISSN:1029-8479

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Abstract

    We report the first measurement of the inclusive e<sup>+</sup>e<sup>−</sup>→$$ b\overline{b} $$→$$ {D}_s^{\pm } $$X and e<sup>+</sup>e<sup>−</sup>→$$ b\overline{b} $$→ D<sup>0</sup>/$$ {\overline{D } }^0 $$X cross sections in the energy range from 10.63 to 11.02 GeV. Based on these results, we determine σ(e<sup>+</sup>e<sup>−</sup>→$$ {B}_s^0{\overline{B } }_s^0 $$X) and σ(e<sup>+</sup>e<sup>−</sup>→$$ B\overline{B} $$X) in the same energy range. We measure the fraction of $$ {B}_s^0 $$ events at Υ(10860) to be f<sub>s</sub> = ($$ {22.0}_{-2.1}^{+2.0} $$)%. We determine also the ratio of the $$ {B}_s^0 $$ inclusive branching fractions $$ \mathcal{B} $$($$ {B}_s^0 $$→ D<sup>0</sup>/$$ {\overline{D } }^0 $$X)/$$ \mathcal{B} $$($$ {B}_s^0 $$→$$ {D}_s^{\pm } $$X) = 0.416 ± 0.018 ± 0.092. The results are obtained using the data collected with the Belle detector at the KEKB asymmetric-energy e<sup>+</sup>e<sup>−</sup> collider.

    DOI: 10.1007/jhep08(2023)131

    Other URL: https://link.springer.com/article/10.1007/JHEP08(2023)131/fulltext.html

  • Search for the double-charmonium state with η$_{c}$J/ψ at Belle Reviewed International coauthorship

    J. H. Yin, Y. B. Li, E. Won et al. [Belle Collaboration]

    Journal of High Energy Physics   2023 ( 8 )   2023.08( eISSN:1029-8479

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    Abstract

    We measure the cross section of e<sup>+</sup>e<sup>−</sup> → η<sub>c</sub>J/ψ at the Υ(nS)(n = 1–5) on-resonance and 10.52 GeV off-resonance energy points using the full data sample collected by the Belle detector with an integrated luminosity of 955 fb<sup>−1</sup>. We also search for double charmonium production in e<sup>+</sup>e<sup>−</sup> → η<sub>c</sub>J/ψ via initial state radiation near the η<sub>c</sub>J/ψ threshold. No evident signal of the double charmonium state is found, but evidence for the e<sup>+</sup>e<sup>−</sup>→ η<sub>c</sub>J/ψ process is found with a statistical significance greater than 3.3σ near the η<sub>c</sub>J/ψ threshold. The average cross section near the threshold is measured and upper limits of cross sections are set for other regions.

    DOI: 10.1007/jhep08(2023)121

    Other URL: https://link.springer.com/article/10.1007/JHEP08(2023)121/fulltext.html

  • Observation of a threshold cusp at the Λ⁢𝜂 threshold in the 𝑝⁢𝐾− mass spectrum with Λ+ 𝑐→𝑝⁢𝐾−⁢𝜋+ decays Reviewed International coauthorship

    S. B. Yang, K. Tanida, J. K. Ahn et al. [Belle Collaboration]

    Physical Review D   108 ( 3 )   2023.08( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.l031104

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.L031104/fulltext

  • Measurement of the 𝜏-lepton mass with the Belle II experiment Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   108 ( 3 )   2023.08( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.032006

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.032006/fulltext

  • Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic $B$-Meson Decays at Belle II Reviewed International coauthorship

    L. Aggarwal et al. [Belle II Collaboration]

    Physical Review Letters   131 ( 5 )   2023.08( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevlett.131.051804

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.131.051804/fulltext

  • Search for the decay 𝐵0→𝐾*0⁢𝜏+⁢𝜏− at the Belle experiment Reviewed International coauthorship

    T. V. Dong, T. Luo et al. [Belle Collaboration]

    Physical Review D   108 ( 1 )   2023.07( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.l011102

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.L011102/fulltext

  • Study of the muon decay-in-flight in the 𝜏−→𝜇−⁢ ¯ 𝜈 𝜇⁢𝜈𝜏 decay to measure the Michel parameter 𝜉′ Reviewed International coauthorship

    D. Bodrov, P. Pakhlov et al. [Belle Collaboration]

    Physical Review D   108 ( 1 )   2023.07( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.012003

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.012003/fulltext

  • First measurement of the $Q^2$ distribution of X(3915) single-tag two-photon production Reviewed International coauthorship

    Y. Teramoto, S. Uehara et al. [Belle Collaboration]

    Physical Review D   108 ( 1 )   2023.07( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.012004

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.012004/fulltext

  • First Measurement of the Michel Parameter 𝜉′ in the 𝜏−→𝜇−⁢ ¯ 𝜈 𝜇⁢𝜈𝜏 Decay at Belle Reviewed International coauthorship

    D. Bodrov, P. Pakhlov et al. [Belle Collaboration]

    Phys.Rev.Lett.   131 ( 2 )   021801 - 021801   2023.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.131.021801

  • Measurement of differential distributions of 𝐵→𝐷*⁢ℓ⁢ ¯ 𝜈 ℓ and implications on |𝑉𝑐⁢𝑏| Reviewed International coauthorship

    M. T. Prim, F. Bernlochner, F. Metzner, K. Lieret, T. Kuhr et al. [Belle Collaboration]

    Physical Review D   108 ( 1 )   2023.07( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.108.012002

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.108.012002/fulltext

  • Novel method for the identification of the production flavor of neutral charmed mesons Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review D   107 ( 11 )   2023.06( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.107.112010

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.112010/fulltext

  • Study of the lineshape of 𝑋⁡(3872) using 𝐵 decays to 𝐷0⁢ ¯ 𝐷 *0⁢𝐾 Reviewed International coauthorship

    H. Hirata, T. Iijima, Y. Kato, K. Tanida et al. [Belle Collaboration]

    Physical Review D   107 ( 11 )   2023.06( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.107.112011

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.112011/fulltext

  • Measurement of the branching fraction and 𝐶⁢𝑃 asymmetry of 𝐵0→𝜋0⁢𝜋0 decays using 198×1⁢06 𝐵⁢ ¯ 𝐵 pairs in Belle II data Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Physical Review D   107 ( 11 )   2023.06( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.107.112009

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.112009/fulltext

  • Search for the Lepton Flavor Violating Decays 𝐵+→𝐾+⁢𝜏±⁢ℓ∓ (ℓ=𝑒, 𝜇) at Belle Reviewed International coauthorship

    S. Watanuki, G. de Marino, K. Trabelsi et al. [Belle Collaboration]

    Physical Review Letters   130 ( 26 )   2023.06( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevlett.130.261802

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.130.261802/fulltext

  • Search for lepton-flavor-violating τ decays into a lepton and a vector meson using the full Belle data sample Reviewed International coauthorship

    N. Tsuzuki, K. Inami et al. [Belle Collaboration]

    Journal of High Energy Physics   2023 ( 6 )   2023.06( eISSN:1029-8479

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    Abstract

    Charged-lepton-flavor-violation is predicted in several new physics scenarios. We update the analysis of τ lepton decays into a light charged lepton (ℓ = e<sup>±</sup> or μ<sup>±</sup>) and a vector meson (V<sup>0</sup> = ρ<sup>0</sup>, ϕ, ω, K<sup>*0</sup>, or $$ \overline{K} $$<sup>*0</sup>) using 980 fb<sup>−1</sup> of data collected with the Belle detector at the KEKB collider. No significant excess of such signal events is observed, and thus 90% credibility level upper limits are set on the τ → ℓV<sup>0</sup> branching fractions in the range of (1.7–4.3) × 10<sup>−8</sup>. These limits are improved by 30% on average from the previous results.

    DOI: 10.1007/jhep06(2023)118

    Other URL: https://link.springer.com/article/10.1007/JHEP06(2023)118/fulltext.html

  • Search for an Invisible 𝑍′ in a Final State with Two Muons and Missing Energy at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review Letters   130 ( 23 )   2023.06( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevlett.130.231801

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.130.231801/fulltext

  • Measurement of the $𝐵^0$ lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019–2021 Belle II data Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Physical Review D   107 ( 9 )   2023.05( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.107.l091102

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.L091102/fulltext

  • First observation of $B\!\to \bar{D}_1(\to\bar{D}\pi^+\pi^-)\ell^+\nu_\ell$ and measurement of the $B\!\to \bar{D}^{(*)}\pi\ell^+\nu_\ell$ and $B\!\to \bar{D}^{(*)}\pi^+\pi^-\ell^+\nu_\ell$ branching fractions with hadronic tagging at Belle Reviewed International coauthorship

    F. Meier, A. Vossen et al. [Belle Collaboration]

    Physical Review D   107 ( 9 )   2023.05( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.107.092003

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.092003/fulltext

  • Search for Lepton-Flavor-Violating 𝜏 Decays to a Lepton and an Invisible Boson at Belle II Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review Letters   130 ( 18 )   2023.05( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevlett.130.181803

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.130.181803/fulltext

  • First Measurement of the 𝐵+→𝜋+⁢𝜋0⁢𝜋0 Branching Fraction and 𝐶⁢𝑃 Asymmetry Reviewed International coauthorship

    Y.-T. Lai et al. [Belle Collaboration]

    Physical Review Letters   130 ( 18 )   2023.05( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevlett.130.181804

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.130.181804/fulltext

  • Search for lepton-flavor-violating $\tau^- \to \ell^-\phi$ decays in 2019-2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2023.05

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Observation of ${B\to D^{(*)} K^- K^{0}_S}$ decays using the 2019-2022 Belle II data sample International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2023.05

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Search for $C\!P$ violation using $T$-odd correlations in $D_{(s)}^{+}\to K^{+} K^{-}\pi^{+}\pi^{0}$, $D_{(s)}^{+}\to K^{+} \pi^{-}\pi^{+}\pi^{0}$, and $D^{+}\to K^{-}\pi^{+}\pi^{+}\pi^{0}$ decays International coauthorship

    L. Li, A. Schwartz, E. Won, K. Kinoshita et al. [Belle Collaboration]

    2023.05

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Study of $𝑒^+⁢𝑒^− \to \Sigma^{0⁢} \bar{\Sigma^0}$ and $\Sigma^+ \bar{\Sigma⁢^−}$ by initial state radiation method at Belle Reviewed International coauthorship

    G. Gong, L. K. Li, Y. Zhang, W. Yan et al. [Belle Collaboration]

    Physical Review D   107 ( 7 )   2023.04( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1103/physrevd.107.072008

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.072008/fulltext

  • First Observation of Λπ+ and Λπ- Signals near the K ¯ N (I=1) Mass Threshold in Λc+ → Λπ+π+π- Decay Reviewed International coauthorship

    Y. Ma et al. [Belle Collaboration]

    Physical Review Letters   130 ( 15 )   151903   2023.04( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Using the data sample of 980 fb-1 collected with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we present the results of an investigation of the Λπ+ and Λπ- invariant mass distributions looking for substructure in the decay Λc+→Λπ+π+π-. We find a significant signal in each mass distribution. When interpreted as resonances, we find for the Λπ+ (Λπ-) combination a mass of 1434.3±0.6(stat)±0.9(syst) MeV/c2 [1438.5±0.9(stat)±2.5(syst) MeV/c2], an intrinsic width of 11.5±2.8(stat)±5.3(syst) MeV/c2 [33.0±7.5(stat)±23.6(syst) MeV/c2] with a significance of 7.5σ (6.2σ). As these two signals are very close to the K̄N threshold, we also investigate the possibility of a K̄N cusp, and find that we cannot discriminate between these two interpretations due to the limited size of the data sample.

    DOI: 10.1103/PhysRevLett.130.151903

    PubMed

  • First Observation of Λ π + and Λ π − Signals near the ¯ K N ( I = 1 ) Mass Threshold in Λ + c → Λ π + π + π − Decay Reviewed International coauthorship

    Y. Ma et al. (Belle Collaboration)

    Physical Review Letters   130 ( 15 )   151903   2023.04

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    DOI: 10.1103/PhysRevLett.130.151903

  • Measurement of lepton mass squared moments in B → X c ℓ ¯ ν ℓ decays with the Belle II experiment Reviewed International coauthorship

    F. Abudinén et al. (Belle II Collaboration)

    Physical Review D   107 ( 7 )   072002   2023.04

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    DOI: 10.1103/PhysRevD.107.072002

  • Measurement of lepton mass squared moments in B →xcℓ ν ¯ ℓ decays with the Belle II experiment Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Physical Review D   107 ( 7 )   072002   2023.04( ISSN:2470-0010 ( eISSN:2470-0029

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    We present measurements of the first to fourth moments of the lepton mass squared q2 of B→Xcℓν¯ℓ decays for ℓ=e, μ and with Xc a hadronic system containing a charm quark. These results use a sample of electron-positron collisions at the ϒ(4S) resonance corresponding to 62.8 fb-1 of integrated luminosity and collected by the Belle II 2 experiment in 2019 and 2020. To identify the Xc system and reconstruct q2, one of the B mesons from an ϒ(4S)→BB¯ decay is fully reconstructed in a hadronic decay mode using a multivariate B tagging algorithm. We report raw and central moments for q2>1.5 GeV2/c4 up to q2>8.5 GeV2/c4, probing up to 77% of the accessible B→Xcℓν¯ℓ phase space. This is the first measurement of moments in the experimentally challenging range of [1.5,2.5] GeV2/c4. The results can be used for a new determination of |Vcb| using inclusive B→Xcℓν¯ℓ decays.

    DOI: 10.1103/PhysRevD.107.072002

  • Two-particle angular correlations in e+e− collisions to hadronic final states in two reference coordinates at Belle Reviewed International coauthorship

    Y.-C. Chen et. al. [Belle Collaboration]

    JHEP   03 ( 171 )   2023.03

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    DOI: 10.1007/JHEP03(2023)171

  • Search for X ( 3872 ) → π + π − π 0 at Belle Reviewed International coauthorship

    J. H. Yin et al. (Belle Collaboration)

    Physical Review D   107 ( 5 )   052004   2023.03

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    DOI: 10.1103/PhysRevD.107.052004

  • Measurement of the branching fraction and search for CP violation in D0 → K0S K0S π+ π− decays at Belle Reviewed International coauthorship

    A. Sangal et al. [Belle Collaboration]

    Physical Review D   107 ( 5 )   052001   2023.03( ISSN:2470-0010 ( eISSN:2470-0029

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    We measure the branching fraction for the Cabibbo-suppressed decay D0→KS0KS0π+π- and search for CP violation via a measurement of the CP asymmetry ACP as well as the T-odd triple-product asymmetry aCPT. We use 922 fb-1 of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy e+e- collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel D0→KS0π+π-; the result is B(D0→KS0KS0π+π-)=[4.79±0.08(stat)±0.10(syst)±0.31(norm)]×10-4, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure ACP=[-2.51±1.44(stat)-0.10+0.11(syst)]%, and aCPT=[-1.95±1.42(stat)-0.12+0.14(syst)]%. These results show no evidence of CP violation.

    DOI: 10.1103/physrevd.107.052001

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.052001/fulltext

  • Observation of e+e- →ωχbJ (1P) and Search for Xb →ω ϒ (1S) at s near 10.75 GeV Reviewed International coauthorship

    I. Adachi et al. [Belle II Collaboration]

    Physical Review Letters   130 ( 9 )   091902   2023.03( ISSN:0031-9007 ( eISSN:1079-7114

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We study the processes e+e-→ωχbJ(1P) (J=0, 1, or 2) using samples at center-of-mass energies s=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb-1 of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the ϒ(4S) resonance. We report the first observation of ωχbJ(1P) signals at s=10.745 GeV. By combining Belle II data with Belle results at s=10.867 GeV, we find energy dependencies of the Born cross sections for e+e-→ωχb1,b2(1P) to be consistent with the shape of the ϒ(10753) state. These data indicate that the internal structures of the ϒ(10753) and ϒ(10860) states may differ. Including data at s=10.653 GeV, we also search for the bottomonium equivalent of the X(3872) state decaying into ωϒ(1S). No significant signal is observed for masses between 10.45 and 10.65 GeV/c2.

    DOI: 10.1103/PhysRevLett.130.091902

    PubMed

  • Observation of e + e − → ω χ b J ( 1 P ) and Search for X b → ω Υ ( 1 S ) at √ s near 10.75 GeV Reviewed International coauthorship

    I. Adachi et al. (Belle II Collaboration)

    Physical Review Letters   130 ( 9 )   091902   2023.03

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevLett.130.091902

  • Search for X (3872) →π+π-π0 at Belle Reviewed International coauthorship

    J. H. Yin, E. Won et al. [Belle Collaboration]

    Physical Review D   107 ( 5 )   052004   2023.03( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We present a search for the decay X(3872)→π+π-π0 in the (772±11)×106 ϒ(4S)→BB¯ data sample collected at the Belle detector, where the X(3872) is produced in B±→K±X(3872) and B0→KS0X(3872) decays. We do not observe a signal, and set 90% credible upper limits for two different models of the decay processes: if the decay products are distributed uniformly in phase space, B(X(3872)→π+π-π0)<1.3%, and if M(π+π-) is concentrated near the mass of the D0D¯0 pair in the process X(3872)→D0D¯∗0+c.c.→D0D¯0π0→π+π-π0, B(X(3872)→π+π-π0)<1.2×10-3.

    DOI: 10.1103/PhysRevD.107.052004

  • Search for the decay Bs0 →π0π0 at Belle Reviewed International coauthorship

    J. Borah, B. Bhuyan et al. [Belle Collaboration]

    Physical Review D   107 ( 5 )   L051101   2023.03( ISSN:2470-0010 ( eISSN:2470-0029

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    We report the results of the first search for the decay Bs0→π0π0 using 121.4 fb-1 of data collected at the ϒ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe no signal and set a 90% confidence level upper limit of 7.7×10-6 on the Bs0→π0π0 decay branching fraction.

    DOI: 10.1103/PhysRevD.107.L051101

  • Measurement of the branching fraction and search for CP violation in D0 → KS0 KS0 π+ π- decays at Belle Reviewed International coauthorship

    A.~Sangal et. al. [Belle Collaboration]

    Physical Review D   107 ( 5 )   052001   2023.03

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.107.052001

  • Two-particle angular correlations in e <sup>+</sup> e <sup>−</sup> collisions to hadronic final states in two reference coordinates at Belle Reviewed International coauthorship

    Y. C. Chen, Y. J. Lee, P. Chang et al. [Belle Collaboration]

    Journal of High Energy Physics   2023 ( 3 )   171   2023.03( eISSN:1029-8479

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    We present the analysis of two-particle angular correlations using coordinate systems defined with the conventional beam axis and the event thrust axis. We propose the latter as a good representation for the correlation structure interpretation in the e+e− collision system. The e+e− collisions to hadronic final states at center-of-mass energies of s = 10.52 GeV and 10.58 GeV are recorded by the Belle detector at KEKB. In this paper, results on the first dataset are supplementary to the previous Belle publication [1]. At the same time, the latter is the first two-particle correlation measurement at collision energy on the Υ(4S) resonance and is sensitive to its decay products. Measurements are reported as a function of the charged-particle multiplicity. Finally, a qualitative understanding of the correlation structure is discussed using a combination of Monte Carlo simulations and experimental data. [Figure not available: see fulltext.].

    DOI: 10.1007/JHEP03(2023)171

  • Angular analysis of the low K + K − invariant mass enhancement in B + → K + K − π + decays Reviewed International coauthorship

    C.-L. Hsu et al. (Belle Collaboration)

    Physical Review D   107 ( 3 )   032013   2023.02

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    DOI: 10.1103/PhysRevD.107.032013

  • Measurement of decay-time-dependent $\textit{CP}$ violation in $B^0 \to J/\psi K^0_S$ decays using 2019-2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2023.02 ( ISSN:2470-0010 ( eISSN:2470-0029

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    DOI: 10.48550/arXiv.2302.12898

  • Measurement of the B + / B 0 production ratio in e + e − collisions at the Υ ( 4 S ) resonance using B → J / ψ ( ℓ ℓ ) K decays at Belle Reviewed International coauthorship

    S. Choudhury et al. (Belle Collaboration)

    Physical Review D   107 ( 3 )   L031102   2023.02

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    DOI: 10.1103/PhysRevD.107.L031102

  • Measurement of the Ω 0 c lifetime at Belle II Reviewed International coauthorship

    F. Abudinén et al. (Belle II Collaboration)

    Physical Review D   107 ( 3 )   L031103   2023.02

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    DOI: 10.1103/PhysRevD.107.L031103

  • Search for a Dark Photon and an Invisible Dark Higgs Boson in μ+μ- and Missing Energy Final States with the Belle II Experiment Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Physical Review Letters   130 ( 7 )   071804   2023.02( ISSN:0031-9007 ( eISSN:1079-7114

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    The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019. With an integrated luminosity of 8.34 fb-1, we observe no evidence for signal. We obtain exclusion limits at 90% Bayesian credibility in the range of 1.7-5.0 fb on the cross section and in the range of 1.7×10-8-200×10-8 on the effective coupling µ2×αD for the A′ mass in the range of 4.0 GeV/c2<MA′<9.7 GeV/c2 and for the h′ mass Mh′<MA′, where µ is the mixing strength between the standard model and the dark photon and αD is the coupling of the dark photon to the dark Higgs boson. Our limits are the first in this mass range.

    DOI: 10.1103/PhysRevLett.130.071804

    PubMed

  • Search for a Dark Photon and an Invisible Dark Higgs Boson in μ + μ − and Missing Energy Final States with the Belle II Experiment Reviewed International coauthorship

    F. Abudinén et al. (Belle II Collaboration)

    Physical Review Letters   130 ( 7 )   071804   2023.02

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    DOI: 10.1103/PhysRevLett.130.071804

  • Measurement of the Λ_c^+ Lifetime Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Phys.Rev.Lett.   130 ( 7 )   071802 - 071802   2023.02( ISSN:0031-9007 ( eISSN:1079-7114

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    An absolute measurement of the Λc+ lifetime is reported using Λc+→pK-π+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the δ(4S) resonance, is 207.2 fb-1. The result, τ(Λc+)=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

    DOI: 10.1103/PhysRevLett.130.071802

    PubMed

  • Measurement of the Λ + c Lifetime Reviewed International coauthorship

    F. Abudinén et al. (Belle II Collaboration)

    Physical Review Letters   130 ( 7 )   071802   2023.02

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    DOI: 10.1103/PhysRevLett.130.071802

  • Search for rare decays B + → D ( * ) + s η , D ( * ) + s ¯ K 0 , D + η , and D + K 0 Reviewed International coauthorship

    M. Kumar et al. (The Belle Collaboration)

    Physical Review D   107 ( 3 )   L031101   2023.02

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    DOI: 10.1103/PhysRevD.107.L031101

  • Measurement of the branching fraction of Ξ 0 c → Λ + c π − at Belle Reviewed International coauthorship

    S. S. Tang et al. (Belle Collaboration)

    Physical Review D   107 ( 3 )   032005   2023.02

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    DOI: 10.1103/PhysRevD.107.032005

  • Measurement of the branching fractions for Cabibbo-suppressed decays D + → K + K − π + π 0 and D + ( s ) → K + π − π + π 0 at Belle Reviewed International coauthorship

    L. K. Li et al. (Belle Collaboration)

    Physical Review D   107 ( 3 )   033003   2023.02

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    DOI: 10.1103/PhysRevD.107.033003

  • First search for the weak radiative decays Λ + c → Σ + γ and Ξ 0 c → Ξ 0 γ Reviewed International coauthorship

    Y. Li et al. (Belle Collaboration)

    Physical Review D   107 ( 3 )   L032001   2023.02

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    DOI: 10.1103/PhysRevD.107.032001

  • Search for rare decays B+ → Ds (∗)+ η, Ds (∗)+ K ¯ 0, D+η, and D+K0 Reviewed International coauthorship

    M. Kumar, V. Bhardwaj, K. Lalwani et al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    We present a study of rare decay modes B+→Ds+h0, B+→Ds∗+h0, and B+→D+h0, where h0 denotes the neutral meson η or K0, using a data sample of (772±10)×106 BB¯ events produced at the ϒ(4S) resonance. The data were collected by the Belle detector operating at the asymmetric-energy KEKB collider. We find no evidence for these decays, so we set upper limits at the 90% confidence level on the branching fractions of B+→Ds+h0, Ds∗+h0, and D+h0 decay modes. Along with these rare decay modes, we report improved measurements of the color-suppressed decay branching fractions B(B¯0→D0η)=(26.6±1.2±2.1)×10-5 and B(B¯0→D0K̄0)=(5.6±0.5±0.2)×10-5. The first and second quoted uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevD.107.L031101

  • Angular analysis of the low K+K- invariant mass enhancement in B+ →k+K-π+ decays Reviewed International coauthorship

    C. L. Hsu, M. E. Sevior et al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    We study the decay B+→K+K-π+ and investigate the angular distribution of K+K- pairs with invariant mass below 1.1 GeV/c2. This region exhibits both a strong enhancement in signal and very large direct CP violation. We construct a coherent sum model for the angular distribution of the S- and P-wave, and report the ratio of their amplitudes, the relative phase and the forward-backward asymmetry. We also report absolute differential branching fractions and direct CP asymmetry for the decay in bins of MK+K- and the differential branching fractions in bins of MK+π-. The results are based on a data sample that contains 772×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The result favors the presence of S- and D-waves in low MK+K- region to the detriment of a P-wave.

    DOI: 10.1103/PhysRevD.107.032013

  • First search for the weak radiative decays Λc+ → ς+γ and Ξc0 → Ξ0γ Reviewed International coauthorship

    Y. Li, C. P. Shen et al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   032001   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    We present the first search for the weak radiative decays Λc+→ς+γ and Ξc0→Ξ0γ using a data sample of 980 fb-1 collected by the Belle detector operating at the KEKB asymmetric-energy e+e- collider. There are no evident Λc+→ς+γ or Ξc0→Ξ0γ signals. Taking the decays Λc+→pK-π+ and Ξc0→Ξ-π+ as normalization channels, the upper limits at 90% credibility level on the ratios of branching fractions B(Λc+→ς+γ)/B(Λc+→pK-π+)<4.0×10-3 and B(Ξc0→Ξ0γ)/B(Ξc0→Ξ-π+)<1.2×10-2 are determined. We obtain the upper limits at 90% credibility level on the absolute branching fractions B(Λc+→ς+γ)<2.6×10-4 and B(Ξc0→Ξ0γ)<1.8×10-4.

    DOI: 10.1103/PhysRevD.107.032001

  • Measurement of branching fractions of $\Lambda_c^+\to{}pK_S^0K_S^0$ and $\Lambda_c^+\to{}pK_S^0\eta$ at Belle Reviewed International coauthorship

    L. Li, K. Kinoshita et al. [Belle Collaboration]

    Phys.Rev.D   107 ( 3 )   032004 - 032004   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    We present a study of a singly Cabibbo-suppressed decay Λc+→pKS0KS0 and a Cabibbo-favored decay Λc+→pKS0η based on 980 fb-1 of data collected by the Belle detector, operating at the KEKB energy-asymmetric e+e- collider. We measure their branching fractions relative to Λc+→pKS0: B(Λc+→pKS0KS0)/B(Λc+→pKS0)=(1.48±0.08±0.04)×10-2 and B(Λc+→pKS0η)/B(Λc+→pKS0)=(2.73±0.06±0.13)×10-1. Combining with the world average B(Λc+→pKS0), we have the absolute branching fractions, B(Λc+→pKS0KS0)=(2.35±0.12±0.07±0.12)×10-4 and B(Λc+→pKS0η)=(4.35±0.10±0.20±0.22)×10-3. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the uncertainty on B(Λc+→pKS0). The mode Λc+→pKS0KS0 is observed for the first time and has a statistical significance of >10σ. The branching fraction of Λc+→pKS0η has been measured with a threefold improvement in precision over previous results and is found to be consistent with the world average.

    DOI: 10.1103/PhysRevD.107.032004

  • Measurement of the B+/B0 production ratio in e+e- collisions at the ϒ (4S) resonance using B →J/ψ (ℓℓ)K decays at Belle Reviewed International coauthorship

    S. Choudhury, S. Sandilya, K. Trabelsi, A. Giri et al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    We measure the ratio of branching fractions for the ϒ(4S) decays to B+B- and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ- (ℓ=e or μ), with 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.

    DOI: 10.1103/PhysRevD.107.L031102

  • Measurement of the branching fraction of Ξc0 → Λc+ π- At Belle Reviewed International coauthorship

    S. S. Tang, Y. B. Li, C. P. Shen et al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    Based on a data sample of 983 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we present the study of the heavy-flavor-conserving decay Ξc0→Λc+π- with Λc+ reconstructed via its pK-π+ decay mode. The branching fraction ratio B(Ξc0→Λc+π-)/B(Ξc0→Ξ-π+) is measured to be 0.38±0.04±0.04. Combining with the world average value of B(Ξc0→Ξ-π+), the branching fraction B(Ξc0→Λc+π-) is deduced to be (0.54±0.05±0.05±0.12)%. Here, the uncertainties above are statistical, systematic, and from B(Ξc0→Ξ-π+), respectively.

    DOI: 10.1103/PhysRevD.107.032005

  • Measurement of the branching fractions for Cabibbo-suppressed decays D+ →K+K-π+π0 and D (s)+ →K+π-π+π0 at Belle Reviewed International coauthorship

    L. K. Li, A. J. Schwartz, K. Kinoshita, E. Won et al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   033003   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    We present measurements of the branching fractions for the singly Cabibbo-suppressed decays D+→K+K-π+π0 and Ds+→K+π-π+π0, and the doubly Cabibbo-suppressed decay D+→K+π-π+π0, based on 980 fb-1 of data recorded by the Belle experiment at the KEKB e+e- collider. We measure these modes relative to the Cabibbo-favored modes D+→K-π+π+π0 and Ds+→K+K-π+π0. Our results for the ratios of branching fractions are B(D+→K+K-π+π0)/B(D+→K-π+π+π0)=(11.32±0.13±0.26)%, B(D+→K+π-π+π0)/B(D+→K-π+π+π0)=(1.68±0.11±0.03)%, and B(Ds+→K+π-π+π0)/B(Ds+→K+K-π+π0)=(17.13±0.62±0.51)%, where the uncertainties are statistical and systematic, respectively. The second value corresponds to (5.83±0.42)×tan4θC, where θC is the Cabibbo angle; this value is larger than other measured ratios of branching fractions for a doubly Cabibbo-suppressed charm decay to a Cabibbo-favored decay. Multiplying these results by world average values for B(D+→K-π+π+π0) and B(Ds+→K+K-π+π0) yields B(D+→K+K-π+π0)=(7.08±0.08±0.16±0.20)×10-3, B(D+→K+π-π+π0)=(1.05±0.07±0.02±0.03)×10-3, and B(Ds+→K+π-π+π0)=(9.44±0.34±0.28±0.32)×10-3, where the third uncertainty is due to the branching fraction of the normalization mode. The first two results are consistent with, but more precise than, the current world averages. The last result is the first measurement of this branching fraction.

    DOI: 10.1103/PhysRevD.107.033003

  • Measurement of the mass and width of the Λc (2625)+ charmed baryon and the branching ratios of Λc (2625)+ → ςc0 π+ and Λc (2625)+ → ςc+ + π- Reviewed International coauthorship

    D. Wang, J. Yelton et al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Using the entire data sample of 980 fb-1 collected at or near the ϒ(4S) resonance with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report the measurement of the mass, width, and the branching ratios of the Λc(2625)+ charmed baryon. The mass difference between Λc(2625)+ and Λc+ is measured to be M(Λc(2625)+)-M(Λc+)=341.518±0.006±0.049 MeV/c2. The upper limit on the width is measured to be Γ(Λc(2625)+)<0.52 MeV/c2 at 90% confidence level. Based on a full Dalitz plot fit, branching ratios with respect to the mode Λc(2625)+→Λc+π+π- are measured to be B(Λc(2625)+→ςc0π+)B(Λc(2625)+→Λc+π+π-)=(5.19±0.23±0.40)% and B(Λc(2625)+→ςc++π-)B(Λc(2625)+→Λc+π+π-)=(5.13±0.26±0.32)%, where the first and second uncertainties are statistical and systematic, respectively. These measurements can be used to further constrain the parameters of the underlying theoretical models.

    DOI: 10.1103/PhysRevD.107.032008

  • Measurement of the Ω_c^0 lifetime at Belle II Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Phys.Rev.D   107 ( 3 )   2023.02( ISSN:2470-0010 ( eISSN:2470-0029

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    We report on a measurement of the ωc0 lifetime using ωc0→ω-π+ decays reconstructed in e+e-→cc¯ data collected by the Belle II experiment and corresponding to 207 fb-1 of integrated luminosity. The result, τ(ωc0)=243±48(stat)±11(syst) fs, agrees with recent measurements indicating that the ωc0 is not the shortest-lived weakly decaying charmed baryon.

    DOI: 10.1103/PhysRevD.107.L031103

  • Development of a vertex finding algorithm using Recurrent Neural Network Reviewed International coauthorship

    Kiichi Goto, Taikan Suehara, Tamaki Yoshioka, Masakazu Kurata, Hajime Nagahara, Yuta Nakashima, Noriko Takemura, Masako Iwasaki

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   1047   2023.02( ISSN:0168-9002 ( eISSN:1872-9576

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    Deep learning is a rapidly-evolving technology with the possibility to significantly improve the physics reach of collider experiments. In this study we developed a novel vertex finding algorithm for future lepton colliders such as the International Linear Collider. We deploy two networks: one consists of simple fully-connected layers to look for vertex seeds from track pairs, and the other is a customized Recurrent Neural Network with an attention mechanism and an encoder-decoder structure to associate tracks to the vertex seeds. The performance of the vertex finder is compared with the standard ILC vertex reconstruction algorithm.

    DOI: 10.1016/j.nima.2022.167836

  • Measurement of two-photon decay width of χ$_{c2}$(1P) in γγ → χ$_{c2}$(1P) → J/ψγ at Belle Reviewed International coauthorship

    Y. Seino, K. Hayasaka, S. Uehara et al. [Belle Collaboration]

    Journal of High Energy Physics   2023 ( 1 )   2023.01( eISSN:1029-8479

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    Abstract

    We report the measurement of the two-photon decay width of χ<sub>c2</sub>(1P) in two-photon processes at the Belle experiment. We analyze the process γγ → χ<sub>c2</sub>(1P) → J/ψγ, J/ψ → ℓ<sup>+</sup>ℓ<sup>−</sup> (ℓ = e or μ) using a data sample of 971 fb<sup>−1</sup> collected with the Belle detector at the KEKB e<sup>+</sup>e<sup>−</sup> collider. In this analysis, the product of the two-photon decay width of χ<sub>c2</sub>(1P) and the branching fraction is determined to be $$ {\Gamma}_{\gamma \gamma}\left({\chi}_{c2}(1P)\right)\mathcal{B}\left({\chi}_{c2}(1P)\to J/\psi \gamma \right)\mathcal{B}\left(J/\psi \to {\ell}^{+}{\ell}^{-}\right)=14.8\pm 0.3\left(\textrm{stat}.\right)\pm 0.7\left(\textrm{syst}.\right) $$ eV, which corresponds to Γ<sub>γγ</sub>(χ<sub>c2</sub>(1P)) = 653 ± 13(stat.) ± 31(syst.) ± 17(B.R.) eV, where the third uncertainty is from $$ \mathcal{B} $$(χ<sub>c2</sub>(1P) → J/ψγ) and $$ \mathcal{B} $$(J/ψ → ℓ<sup>+</sup>ℓ<sup>−</sup>).

    DOI: 10.1007/jhep01(2023)160

    Other URL: https://link.springer.com/article/10.1007/JHEP01(2023)160/fulltext.html

  • Measurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle Reviewed International coauthorship

    Y.Seino et. al. [Belle Collaboration]

    JHEP   01 ( 160 )   2023.01

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    DOI: 10.1007/JHEP01(2023)160

  • Evidence of a New Excited Charmed Baryon Decaying to Σ𝑐⁢(2455)0,++⁢𝜋± Reviewed International coauthorship

    Y. B. Li, C. P. Shen et al. [Belle Collaboration]

    Physical Review Letters   130 ( 3 )   2023.01( ISSN:0031-9007 ( eISSN:1079-7114

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    DOI: 10.1103/physrevlett.130.031901

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.130.031901/fulltext

  • Search for the decay Bs0 → π0 π0 at Belle Reviewed International coauthorship

    J. Borah et. al. [Belle Collaboration]

    Physical Review D   107 ( 5 )   L051101   2023.01

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    DOI: 10.1103/PhysRevD.107.L051101

  • Evidence of a New Excited Charmed Baryon Decaying to Σ c ( 2455 ) 0 , + + π ± Reviewed International coauthorship

    Y. B. Li et al. (Belle Collaboration)

    Physical Review Letters   130 ( 3 )   031901   2023.01

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    DOI: 10.1103/PhysRevLett.130.031901

  • Evidence for the singly Cabibbo-suppressed decay $ {\Omega}_c^0\to {\Xi}^{-}{\pi}^{+} $ and search for $ {\Omega}_c^0\to {\Xi}^{-}{K}^{+} $ and Ω$^{−}$K$^{+}$ decays at Belle Reviewed International coauthorship

    X. Han, S. Jia, L. Yuan, C. P. Shen et al. [Belle Collaboration]

    Journal of High Energy Physics   2023 ( 1 )   2023.01( eISSN:1029-8479

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    Abstract

    Using a data sample of 980 fb<sup>−1</sup> collected with the Belle detector at the KEKB asymmetric-energy e<sup>+</sup>e<sup>−</sup> collider, we study for the first time the singly Cabibbo-suppressed decays $$ {\Omega}_c^0\to {\Xi}^{-}{\pi}^{+} $$ and Ω<sup>−</sup>K<sup>+</sup> and the doubly Cabibbo-suppressed decay $$ {\Omega}_c^0\to {\Xi}^{-}{K}^{+} $$. Evidence for an $$ {\Omega}_c^0 $$ signal in the $$ {\Omega}_c^0 $$→ Ξ<sup>−</sup>π<sup>+</sup> mode is reported with a significance of 4.5σ including systematic uncertainties. The ratio of branching fractions to the normalization mode $$ {\Omega}_c^0 $$→ Ω<sup>−</sup>π<sup>+</sup> is measured to be$$ \mathcal{B}\left({\Omega}_c^0\to {\Xi}^{-}{\pi}^{+}\right)/\mathcal{B}\left({\Omega}_c^0\to {\Omega}^{-}{\pi}^{+}\right)=0.253\pm 0.052\left(\textrm{stat}.\right)\pm 0.030\left(\textrm{syst}.\right). $$

    No significant signals of $$ {\Omega}_c^0\to {\Xi}^{-}{K}^{+} $$ and Ω<sup>−</sup>K<sup>+</sup> modes are found. The upper limits at 90% confidence level on ratios of branching fractions are determined to be$$ \mathcal{B}\left({\Omega}_c^0\to {\Xi}^{-}{K}^{+}\right)/\mathcal{B}\left({\Omega}_c^0\to {\Omega}^{-}{\pi}^{+}\right)&lt;0.070 $$

    and$$ \mathcal{B}\left({\Omega}_c^0\to {\Omega}^{-}{K}^{+}\right)/\mathcal{B}\left({\Omega}_c^0\to {\Omega}^{-}{\pi}^{+}\right)&lt;0.29. $$

    DOI: 10.1007/jhep01(2023)055

    Other URL: https://link.springer.com/article/10.1007/JHEP01(2023)055/fulltext.html

  • Evidence for the singly Cabibbo-suppressed decay Ω0c→Ξ−π+ and search for Ω0c→Ξ−K+ and Ω−K+ decays at Belle Reviewed International coauthorship

    X.Han et. al. [Belle Collaboration]

    JHEP   01 ( 055 )   2023.01

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    DOI: 10.1007/JHEP01(2023)055

  • Measurement of the $B^{0} \rightarrow D^{*-} \ell^{+} \nu_{\ell}$ branching ratio and $|V_{cb}|$ with a fully reconstructed accompanying $B$ meson in 2019-2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2023.01

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  • Study of e+e- →ηφ via initial state radiation at Belle Reviewed International coauthorship

    W. J. Zhu, B. S. Gao, X. L. Wang et al. [Belle Collaboration]

    Physical Review D   107 ( 1 )   2023.01( ISSN:2470-0010 ( eISSN:2470-0029

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    Using 980 fb-1 of data collected on and around the (nS) (n=1, 2, 3, 4, 5) resonances with the Belle detector at the KEKB collider, we measure the cross section of e+e-→ηφ from threshold to 3.95 GeV via initial state radiation. There are clear φ(1680) and J/ψ signals but no significant φ(2170) signal in the ηφ final state. The branching fraction B[J/ψ→ηφ] is measured to be (7.2±0.8±0.5)×10-4. The resonant parameters of φ(1680) are determined to be mφ(1680)=(1696±8±10) MeV/c2 (statistical and systematic errors, respectively), Γφ(1680)=(175±13±16) MeV and, depending on the possible presence of predominantly constructive or destructive interference between φ(1680) and continuum production, Γφ(1680)e+e-·B[φ(1680)→ηφ] and B[φ(1680)→ηφ] are determined to be (75±10±11) eV and (25±12±2)% or (207±16±20) eV and (23±10±2)%, respectively. The upper limit for Γφ(2170)e+e-·B[φ(2170)→ηφ] is determined to be either 0.17 or 18.6 eV at the 90% confidence level.

    DOI: 10.1103/PhysRevD.107.012006

  • Measurements of the branching fractions B (B ¯ 0 →d∗+π-) and B (B ¯ 0 →d∗+K-) and tests of QCD factorization Reviewed International coauthorship

    J. F. Krohn, D. Ferlewicz, P. Urquijo et al. [Belle Collaboration]

    Physical Review D   107 ( 1 )   2023.01( ISSN:2470-0010 ( eISSN:2470-0029

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    Using (771.6±10.6)×106 BB¯ meson pairs recorded by the Belle experiment at the KEKB e+e- collider, we report the branching fractions B(B¯0→D∗+π-)=(2.62±0.02±0.09)×10-3 and B(B¯0→D∗+K-)=(2.22±0.06±0.08)×10-4; the quoted uncertainties are statistical and systematic, respectively. A measurement of the ratio of these branching fractions is also presented, RK/π=B(B¯→D∗+K-)/B(B¯→D∗+π-)=(8.41±0.24±0.13)×10-2, where systematic uncertainties due to the D∗+ meson reconstruction cancel out. Furthermore, we report a new QCD factorization test based on the measured ratios for B¯→D∗+h- and B¯→D∗+ℓ-ν decays at squared momentum transfer values equivalent to the mass of the h=π or K hadron. The parameters |a1(h)| are measured to be |a1(π)|=0.884±0.004±0.003±0.016 and |a1(K)|=0.913±0.019±0.008±0.013, where the last uncertainties account for all external inputs. These values are approximately 15% lower than those expected from theoretical predictions. Subsequently, flavor SU(3) symmetry is tested by measuring the ratios for pions and kaons, |a1(K)|2/|a1(π)|2=1.066±0.042±0.018±0.023, as well as for different particle species. The ratio is consistent with unity and therefore no evidence for SU(3) symmetry breaking effects is found at the 5% precision level.

    DOI: 10.1103/PhysRevD.107.012003

  • Measurements of the branching fractions B(B0 → D*+ π-) and B(B0 → D*+K-) and tests of QCD factorization Reviewed International coauthorship

    J.F. Krohn et. al. [Belle Collaboration]

    Physical Review D   107 ( 1 )   012003   2023.01

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    DOI: 10.1103/PhysRevD.107.012003

  • Measurement of the mass and width of the Λc(2625)+ charmed baryon and the branching ratios of Λc(2625)+ --> Σc0 π+ and Λc(2625)+ --> Σc++ π- Reviewed International coauthorship

    D. Wang et. al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   032008   2022.12

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    DOI: 10.1103/PhysRevD.107.032008

  • Erratum to: Combined analysis of Belle and Belle II data to determine the CKM angle ϕ <inf>3</inf> using B<sup>+</sup> → D(K S 0 h<sup>+</sup>h<sup> −</sup>)h<sup>+</sup> decays (Journal of High Energy Physics, (2022), 2022, 2, (63), 10.1007/JHEP02(2022)063) Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Journal of High Energy Physics   2022 ( 12 )   2022.12( eISSN:1029-8479

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    DOI: 10.1007/JHEP12(2022)034

  • Reconstruction of $B \to \rho \ell \nu_\ell$ decays identified using hadronic decays of the recoil $B$ meson in 2019 -- 2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.11

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  • Measurement of the photon-energy spectrum in inclusive $B\rightarrow X_{s}\gamma$ decays identified using hadronic decays of the recoil $B$ meson in 2019-2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.10

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  • Measurement of branching fractions of Λ_c^+→pK_S^0K_S^0 and Λ_c^+→pK_S^0η at Belle Reviewed International coauthorship

    L.K. Li et. al. [Belle Collaboration]

    Physical Review D   107 ( 3 )   032004   2022.10

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    DOI: 10.1103/PhysRevD.107.032004

  • Determination of $|V_{ub}|$ from untagged $B^0\to\pi^- \ell^+ \nu_{\ell}$ decays using 2019-2021 Belle II data International coauthorship

    K. Adamczyk et.al. [Belle II Collaboration]

    2022.10

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  • Determination of $|V_{cb}|$ from $B\to D\ell\nu$ decays using 2019-2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.10

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  • Measurement of the branching fractions and $CP$ asymmetries of $B^+ \rightarrow \pi^+ \pi^0$ and $B^+ \rightarrow K^+ \pi^0$ decays in 2019-2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.09

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  • Measurement of decay-time dependent $CP$ violation in $B^0 \rightarrow K^0_S K^0_S K^0_S$ using 2019--2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Measurement of the branching fractions of the B+ →ηâ "+νâ " and B+ →η′â "+νâ " decays with signal-side only reconstruction in the full q2 range Reviewed International coauthorship

    U. Gebauer, C. Beleño, A. Frey et al. [Belle Collaboration]

    Physical Review D   106 ( 3 )   2022.08( ISSN:2470-0010 ( eISSN:2470-0029

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    The branching fractions of the decays B+→ηâ "+νâ "and B+→η′â "+νâ "are measured, where â "is either an electron or a muon, using a data sample of 711 fb-1 containing 772×106BB¯ pairs collected at the I (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e-collider. To reduce the dependence of the result on the form factor model, the measurement is performed over the entire q2 range. The resulting branching fractions are B(B+→ηâ "+νâ ")=(2.83±0.55(stat.)±0.34(syst.))×10-5 and B(B+→η′â "+νâ ")=(2.79±1.29(stat.)±0.30(syst.))×10-5.

    DOI: 10.1103/PhysRevD.106.032013

  • Measurement of Branching Fraction and Longitudinal Polarization in $B^0 \to \rho^+ \rho^-$ Decays at Belle II International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.08

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  • Search for Z ′ → μ + μ − in the L μ − L τ gauge-symmetric model at Belle Reviewed International coauthorship

    T. Czank, I. Jaegle, A. Ishikawa et al. [Belle Collaboration]

    Physical Review D   106 ( 1 )   2022.07( ISSN:2470-0010 ( eISSN:2470-0029

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    We search for a new gauge boson Z′ that couples only to heavy leptons and their corresponding neutrinos in the process e+e-→Z′(→μ+μ-)μ+μ-, using a 643 fb-1 data sample collected by the Belle experiment at or near the ϒ(1S,2S,3S,4S,5S) resonances at the KEKB collider. While previous searches for Z′ performed a data-based estimation of the initial state radiation effect, our search for the Z′ is the first to include effects due to initial state radiation in the signal simulated samples that were used in estimating the detection efficiency. No signal is observed in the Z′ mass range of 0.212-10 GeV/c2, and we set an upper limit on the coupling strength, g′, constraining the possible Z′ contribution to the anomalous magnetic dipole moment of the muon.

    DOI: 10.1103/physrevd.106.012003

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.106.012003/fulltext

  • Search for the radiative penguin decays B0 → KS0 KS0 γ in the Belle experiment Reviewed International coauthorship

    H. B. Jeon, K. H. Kang, H. Park et al. [Belle Collaboration]

    Physical Review D   106 ( 1 )   2022.07( ISSN:2470-0010 ( eISSN:2470-0029

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    We report results from the first search for the rare penguin-dominated decay mode B0→KS0KS0γ, which can result from the production of tensor mesons f(1270) and f′(1525) in association with a photon. The search uses the full data sample of 772×106 BB¯ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No statistically significant signals are observed in the KS0KS0 invariant mass range 1 GeV/c2<MKS0KS0<3 GeV/c2, and the following upper limits at the 90% confidence level are obtained: B(B0→KS0KS0γ)<5.8×10-7, B(B0→f2γ)×B(f2(1270)→KS0KS0)<3.1×10-7, and B(B0→f2′γ)×B(f2′(1525)→KS0KS0)<2.1×10-7. In addition, 90% confidence-level upper limits in the range of [0.7-2.9]×10-7 are also obtained on the B0→KS0KS0γ branching fraction in bins of MKS0KS0.

    DOI: 10.1103/PhysRevD.106.012006

  • Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J/\psi K$ decays at Belle II International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.07

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  • Study of γ γ → γ ψ ( 2 S ) at Belle Reviewed International coauthorship

    X.L. Wang, B.S. Gao, W.J. Zhu et al. [Belle Collaboration]

    Phys.Rev.D   105 ( 11 )   112011 - 112011   2022.06( ISSN:2470-0010 ( eISSN:2470-0029

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    Using 980 fb-1 of data at and around the I (nS) (n=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy e+e-collider, the two-photon process γγ→γψ(2S) is studied from the threshold to 4.2 GeV for the first time. Two structures are seen in the invariant mass distribution of γψ(2S): one at MR1=3922.4±6.5±2.0 MeV/c2 with a width of ΓR1=22±17±4 MeV, and another at MR2=4014.3±4.0±1.5 MeV/c2 with a width of ΓR2=4±11±6 MeV; the signals are parametrized with the incoherent sum of two Breit-Wigner functions. The first structure is consistent with the X(3915) or the χc2(3930), and the local statistical significance is determined to be 3.1σ with the systematic uncertainties included. The second matches none of the known charmonium or charmoniumlike states, and its global significance is determined to be 2.8σ including the look-elsewhere effect. The production rates are ΓγγB(R1→γψ(2S))=9.8±3.6±1.3 eV assuming (JPC,|λ|)=(0++,0) or 2.0±0.7±0.2 eV with (2++,2) for the first structure and ΓγγB(R2→γψ(2S))=6.2±2.2±0.8 eV with (0++,0) or 1.2±0.4±0.2 eV with (2++,2) for the second. Here, the first errors are statistical and the second systematic, and λ is the helicity.

    DOI: 10.1103/PhysRevD.105.112011

  • Study of Exclusive $B \to \pi e^+ \nu_e$ Decays with Hadronic Full-event-interpretation Tagging in 189.3 fb$^{-1}$ of Belle II Data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.06

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  • Angular analysis of $B^+ \to \rho^+\rho^0$ decays reconstructed in 2019, 2020, and 2021 Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.06

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  • First decay-time-dependent analysis of $B^{0} \to K_{S}^{0} \pi^{0}$ at Belle II International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.06

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  • Measurement of the branching fraction for the decay $B \to K^{\ast}(892)\ell^+\ell^-$ at Belle II International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.06

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  • Measurement of the branching fraction of the $B^0 \to K_S^0 \pi^0 \gamma$ decay using 190 fb$^{-1}$ of Belle II data International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    2022.06

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

  • Search for charged lepton flavor violating decays of ϒ (1S) Reviewed International coauthorship

    S. Patra et. al. [Belle Collaboration]

    JHEP   05 ( 095 )   2022.05

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP05(2022)095

  • First test of lepton flavor universality in the charmed baryon decays ωc0 → ω-ℓ+νℓ using data of the Belle experiment Reviewed International coauthorship

    Y. B. Li, C. P. Shen et al. [Belle Collaboration]

    Physical Review D   105 ( 9 )   2022.05( ISSN:2470-0010 ( eISSN:2470-0029

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    We present the first observation of the ωc0→ω-μ+νμ decay and present measurements of the branching fraction ratios of the ωc0→ω-ℓ+νℓ decays compared to the reference mode ωc0→ω-π+, (ℓ=e or μ). This analysis is based on 89.5 fb-1, 711 fb-1, and 121.1 fb-1 data samples collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at the center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.86 GeV, respectively. The ωc0 signal yields are extracted by fitting Mωℓ and Mωπ spectra. The branching fraction ratios B(ωc0→ω-e+νe)/B(ωc0→ω-π+) and B(ωc0→ω-μ+νμ)/B(ωc0→ω-π+) are measured to be 1.98±0.13(stat)±0.08(syst) and 1.94±0.18(stat)±0.10(syst), respectively. The ratio of B(ωc0→ω-e+νe)/B(ωc0→ω-μ+νμ) is measured to be 1.02±0.10(stat)±0.02(syst), which is consistent with the expectation of lepton flavor universality.

    DOI: 10.1103/PhysRevD.105.L091101

  • Search for charged lepton flavor violating decays of ϒ (1S) Reviewed International coauthorship

    S. Patra, V. Bhardwaj, K. Trabelsi et al. [Belle Collaboration]

    Journal of High Energy Physics   2022 ( 5 )   2022.05( eISSN:1029-8479

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    We present a search for the charged lepton-flavor-violating decays ϒ(1S) →ℓ±ℓ′∓ and radiative charged lepton-flavour-violating decays ϒ(1S) → γℓ±ℓ′∓ [ℓ,ℓ′ = e, μ, τ] using the 158 million ϒ(2S) sample collected by the Belle detector at the KEKB collider. This search uses ϒ(1S) mesons produced in ϒ(2S) → π+π− ϒ(1S) transitions. We do not find any significant signal, so we provide upper limits on the branching fractions at the 90% confidence level. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP05(2022)095

  • Measurement of Two-Particle Correlations of Hadrons in e+e- Collisions at Belle Reviewed International coauthorship

    Y.-C. Chen, Y.-J. Lee, P. Chang et al. [Belle Collaboration]

    Phys.Rev.Lett.   128 ( 14 )   142005 - 142005   2022.04( ISSN:0031-9007 ( eISSN:1079-7114

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    The measurement of two-particle angular correlation functions in high-multiplicity e+e-collisions at s=10.52 GeV is reported. In this study, the 89.5 fb-1 of hadronic e+e-annihilation data collected by the Belle detector at KEKB are used. Two-particle angular correlation functions are measured in the full relative azimuthal angle (Δφ) and three units of pseudorapidity (Δη), defined by either the electron beam axis or the event-shape thrust axis, and are studied as a function of charged-particle multiplicity. The measurement in the thrust axis analysis, with mostly outgoing quark pairs determining the reference axis, is sensitive to the region of additional soft gluon emissions. No significant anisotropic collective behavior is observed with either coordinate analyses. Near-side jet correlations appear to be absent in the thrust axis analysis. The measurements are compared to predictions from various event generators and are expected to provide new constraints to the phenomenological models in the low-energy regime.

    DOI: 10.1103/PhysRevLett.128.142005

    PubMed

  • Measurement of Two-Particle Correlations of Hadrons in e + e − Collisions at Belle Reviewed International coauthorship

    Y.-C. Chen et al. (Belle Collaboration)

    Physical Review Letters   128 ( 14 )   142005   2022.04

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    DOI: 10.1103/PhysRevLett.128.142005

  • Measurement of the branching fraction and CP asymmetry for B → D ¯ 0π decays Reviewed International coauthorship

    T. Bloomfield, M. E. Sevior et al. [Belle Collaboration]

    Physical Review D   105 ( 7 )   2022.04( ISSN:2470-0010 ( eISSN:2470-0029

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    We measure the branching fractions and CP asymmetries for the decays B0→D¯0π0 and B+→D¯0π+, using a data sample of 772×106 BB¯ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e- collider. The branching fractions obtained and direct CP asymmetries are B(B0→D¯0π0)=[2.70±0.06(stat)±0.10(syst)]×10-4, B(B+→D¯0π+)=[4.53±0.02(stat)±0.15(syst)]×10-3, ACP(B0→D¯0π0)=[+0.42±2.05(stat)±1.22(syst)]%, and ACP(B+→D¯0π+)=[+0.19±0.36(stat)±0.57(syst)]%. The measurements of B are the most precise to date and are in good agreement with previous results, as is the measurement of ACP(B+→D¯0π+). The measurement of ACP for B0→D¯0π0 is the first for this mode, and the value is consistent with Standard Model expectations.

    DOI: 10.1103/PhysRevD.105.072007

  • An improved search for the electric dipole moment of the τ lepton Reviewed International coauthorship

    K. Inami, K. Hayasaka et al. [Belle Collaboration]

    Journal of High Energy Physics   2022 ( 4 )   2022.04( eISSN:1029-8479

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    We report a measurement of the electric dipole moment of the τ lepton (dτ) using an 833 fb−1 data sample collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e− collider. Using an optimal observable method, we obtain the real and imaginary parts of dτ as Re(dτ) = (−0.62 ± 0.63) × 10−17ecm and Im(dτ) = (−0.40 ± 0.32) × 10−17ecm, respectively. These results are consistent with null electric dipole moment at the present level of experimental sensitivity and improve the sensitivity by about a factor of three. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP04(2022)110

  • Developments of control system for ion source using machine learning Reviewed International coauthorship

    Y. Morita, M. Fukuda, T. Yorita, H. Kanda, K. Hatanaka, T. Saitou, H. Tamura, Y. Yasuda, T. Washio, Y. Nakashima, M. Iwasaki, H. W. Koay, K. Takeda, T. Hara, T. H. Chong, H. Zhao

    Journal of Physics: Conference Series   2244 ( 1 )   2022.04( ISSN:1742-6588 ( eISSN:1742-6596

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    Publishing type:Research paper (international conference proceedings)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Various factors influence each other in an ion source. Therefore, when operating an ion source, it is necessary to optimize and adjust various parameters. This time, we performed an experiment to automize adjustment that maximizes the brightness of the beam using machine learning. By automatically adjusting 4 parameters, we succeeded in finding a point with a beam brightness of 4.32 × 10-6 mA/(imm mrad)2 in 25 steps. This shows that automatic adjustment using Bayesian optimization is feasible.

    DOI: 10.1088/1742-6596/2244/1/012105

  • First measurement of the Λ+c → pη′ decay Reviewed International coauthorship

    S.X. Li et. al. [Belle Collaboratio]

    JHEP   03 ( 090 )   2022.03

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    DOI: 10.1007/JHEP03(2022)090

  • Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle Reviewed International coauthorship

    C. Hadjivasiliou, B. G. Fulsom, J. F. Strube et al. [Belle Collaboration]

    Physical Review D   105 ( 5 )   2022.03( ISSN:2470-0010 ( eISSN:2470-0029

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    We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb-1 data sample that contains 772×106 BB¯ pairs and was collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode and require the remainder of the event to consist of only a single Λ. No evidence for these decays is found, and we set 90% confidence level upper limits on the branching fractions in the range 2.1-3.8×10-5. This measurement provides the world's most restrictive limits, with implications for baryogenesis and dark matter production.

    DOI: 10.1103/PhysRevD.105.L051101

  • The International Linear Collider: Report to Snowmass 2021 International coauthorship

    A. Aryshev et al. [The ILC International Development Team and The ILC community]

    Snowmass 2021   2022.03

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    DOI: 10.48550/arXiv.2203.07622

  • First measurement of the Λc+ → pη′ decay Reviewed International coauthorship

    S. X. Li, J. X. Cui, C. P. Shen et al. [Belle Collaboration]

    Journal of High Energy Physics   2022 ( 3 )   2022.03( eISSN:1029-8479

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay Λc+→ pη′ with η′ → ηπ+π−, using a data sample corresponding to an integrated luminosity of 981 fb−1, collected by the Belle detector at the KEKB e+e− asymmetric-energy collider. A significant Λc+→ pη′ signal is observed for the first time with a signal significance of 5.4σ. The relative branching fraction with respect to the normalization mode Λc+→ pK−π+ is measured to beB(Λc+→pη′)B(Λc+→pK−π+)=(7.54±1.32±0.73)×10−3, where the uncertainties are statistical and systematic, respectively. Using the world-average value of B(Λc+→pK−π+) = (6.28 ± 0.32) × 10−2, we obtainB(Λc+→pη′)=(4.73±0.82±0.46±0.24)×10−4, where the uncertainties are statistical, systematic, and from B(Λc+→pK−π+), respectively. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP03(2022)090

  • Search for tetraquark states Xcc s- s- in Ds+ Ds+ (Ds∗+ Ds∗+) final states at Belle Reviewed International coauthorship

    X. Y. Gao, Y. Li, C. P. Shen et al. [Belle Collaboration]

    Physical Review D   105 ( 3 )   2022.02( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    A search for double-heavy tetraquark state candidates Xccs¯s¯ decaying to Ds+Ds+ and Ds∗+Ds∗+ is presented for the first time using the data samples of 102×106 ϒ(1S) and 158×106 ϒ(2S) events, and the data samples at s=10.52, 10.58, and 10.867 GeV corresponding to integrated luminosities of 89.5, 711.0, and 121.4 fb-1, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. The invariant-mass spectra of the Ds+Ds+ and Ds∗+Ds∗+ are studied to search for possible resonances. No significant signals are observed, and the 90% confidence level upper limits on the product branching fractions [B(ϒ(1S,2S)→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in ϒ(1S,2S) inclusive decays and the product values of Born cross section and branching fraction [σ(e+e-→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in e+e- collisions at s=10.52, 10.58, and 10.867 GeV under different assumptions of Xccs¯s¯ masses and widths are obtained.

    DOI: 10.1103/PhysRevD.105.032002

  • Combined analysis of Belle and Belle II data to determine the CKM angle ϕ <inf>3</inf> using B <sup>+</sup> → D(KS0 h <sup>+</sup> h <sup> −</sup>)h <sup>+</sup> decays Reviewed International coauthorship

    F. Abudinén et al. [Belle II Collaboration]

    Journal of High Energy Physics   2022 ( 2 )   2022.02( eISSN:1029-8479

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We present a measurement of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle ϕ3 (also known as γ) using a model-independent Dalitz plot analysis of B+ → D (KS0h+h−)h+, where D is either a D0 or D¯ 0 meson and h is either a π or K. This is the first measurement that simultaneously uses Belle and Belle II data, combining samples corresponding to integrated luminosities of 711 fb−1 and 128 fb−1, respectively. All data were accumulated from energy-asymmetric e+e− collisions at a centre-of-mass energy corresponding to the mass of the Υ(4S) resonance. We measure ϕ3 = (78.4 ± 11.4 ± 0.5 ± 1.0)°, where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is from the uncertainties on external measurements of the D-decay strong-phase parameters. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP02(2022)063

  • Study of B¯0→D+h−(h=K/π) decays at Belle Reviewed International coauthorship

    E. Waheed, P. Urquijo et al. [Belle Collaboration]

    Physical Review D   105 ( 1 )   2022.01( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We present a measurement of the branching fractions of the Cabibbo favored (B) over bar (0) -> D+pi(-) and the Cabibbo suppressed (B) over bar (0) -> D+K- decays. We find B((B) over bar (0) -> D+pi(-)) = (2.48 +/- 0.01 +/- 0.09 +/- 0.04) x 10(-3) and B((B) over bar (0) -> D+K-) = (2.03 +/- 0.05 +/- 0.07 +/- 0.03) x 10(-4) decays, where the first uncertainty is statistical, the second is systematic, and the third uncertainty is due to the D+ -> K-pi(+)pi(+) branching fraction. The ratio of branching fractions of (B) over bar (0) -> D+K- and (B) over bar (0) -> D+pi(-) is measured to be R-D = [8.19 +/- 0.20(stat) +/- 0.23(syst)] x 10(-2). These measurements are performed using the full Belle dataset, which corresponds to 772 x 10(6) B (B) over bar pairs and use the Belle II software framework for data analysis.

    DOI: 10.1103/physrevd.105.012003

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.105.012003/fulltext

  • Measurement of B(Bs→DsX) with Bs semileptonic tagging Reviewed International coauthorship

    B. Wang, K. Kinoshita et al. [Belle Collaboration]

    Physical Review D   105 ( 1 )   012004 - 012004   2022.01( ISSN:2470-0010 ( eISSN:2470-0029

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    We report the first direct measurement of the inclusive branching fraction B(B-s -> DsX) via B-s tagging in e(+)e(-) -> gamma(5S) events. Tagging is accomplished through a partial reconstruction of semileptonic decays B-s -> D(s)Xl nu, where X denotes unreconstructed additional hadrons or photons and l is an electron or muon. With 121.4 fb(-1) of data collected at the gamma(5S) resonance by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we obtain B(B-s -> DsX) = (60.2 +/- 5.8 +/- 2.3)%, where the first uncertainty is statistical and the second is systematic.

    DOI: 10.1103/physrevd.105.012004

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.105.012004/fulltext

  • Search for the decay Bs0→ηη Reviewed International coauthorship

    B. Bhuyan, K. J. Nath, J. Borah et al. [Belle Collaboration]

    Physical Review D   105 ( 1 )   2022.01( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    We report results from a search for the decay B-s(0) -> eta eta using 121.4 fb(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We do not observe any signal and set an upper limit on the branching fraction of 14.3 x 10(-5) at 90% confidence level. This result represents a significant improvement over the previous most stringent limit.

    DOI: 10.1103/physrevd.105.012007

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.105.012007/fulltext

  • Measurements of the branching fractions of Ξc0→ΛKS0, Ξc0→Σ0KS0, and Ξc0→Σ+K− decays at Belle Reviewed International coauthorship

    Y. Li, J. X. Cui, S. Jia, C. P. Shen et al. [Belle Collaboration]

    Physical Review D   105 ( 1 )   2022.01( ISSN:2470-0010 ( eISSN:2470-0029

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Using the entire data sample of 980 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we present measurements of the branching fractions of the Cabibbo-favored decays Xi c(0) -> Lambda K-S(0), Xi(0)(c) ->Sigma K-0(S)0, and Xi c(0) -> Sigma K-+(-). Taking the decay Xi c(0) -> Xi(-)pi(+) as the normalization mode, we measure the branching fraction ratio B(Xi(0)(c) -> Lambda K-S(0))=B(Xi(0)(c) -> Xi(-)pi(+)) = 0.229 + 0.008 + 0.012 with improved precision, and measure the branching fraction ratios B(Xi 0c -> Sigma K-0(S)0)=B(Xi(0)(c) -> Xi(-)pi(+)) = 0.038 + 0.006 + 0.004 and B(Xi(0)(c) -> Sigma K-+(-))=B(Xi(0)(c) -> Xi(-)pi(+)) = 0.123 + 0.007 + 0.010 for the first time. Taking into account the branching fraction of the normalization mode, the absolute branching fractions are determined to be B(Xi(0)(c) -> Lambda K-S(0)) = (3.27 + 0.11 + 0.17 + 0.73) x 10(-3), B(Xi(0)(c) -> Sigma K-0(S)0) = (0.54 + 0.09 + 0.06 +0.12) x 10(-3), and B(Xi(0)(c) -> Sigma K-+(-)) = (1.76 + 0.10 + 0.14 + 0.39) x 10(-3). The first and second uncer-tainties above are statistical and systematic, respectively, while the third ones arise from the uncertainty of the branching fraction of Xi(0)(c) -> Xi(-)pi(+).

    DOI: 10.1103/physrevd.105.l011102

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.105.L011102/fulltext

  • Search for B0 -> Tau +/- l -/+ (l = e, mu) with a hadronic tagging method at Belle Reviewed

    Atmacan H., Schwartz A. J., Kinoshita K., Adachi I, Adamczyk K., Aihara H., Al Said S., Asner D. M., Aulchenko V, Aushev T., Ayad R., Babu V, Bahinipati S., Bauer M., Behera P., Belous K., Bennett J., Bernlochner F., Bessner M., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bobrov A., Bozek A., Branchini P., Browder T. E., Budano A., Campajola M., Cao L., Chang M-C, Chang P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V, Dubey S., Epifanov D., Ferber T., Ferlewicz D., Frey A., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Graziani E., Greenwald D., Gu T., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hou W-S, Hsu C-L, Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joo K. K., Kaliyar A. B., Kang K. H., Kato Y., Kawasaki T., Kiesling C., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kim Y-K, Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kumara K., Kwon Y-J, Lai Y-T, Lange J. S., Laurenza M., Lee S. C., Li J., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty G. B., Mussa R., Nakao M., Natkaniec Z., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park H., Park S-H, Passeri A., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Ripp-Baudot I, Rostomyan A., Rout N., Russo G., Sahoo D., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shen C. P., Shiu J-G, Simon F., Sokolov A., Solovieva E., Stottler Z. S., Sumihama M., Sumisawa K., Sumiyoshi T., Sutcliffe W., Tamponi U., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno K., Uno S., Urquijo P., Vahsen S. E., Van Tonder R., Varner G., Varvell K. E., Vinokurova A., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang P., Wang X. L., Watanabe M., Watanuki S., Wiechczynski J., Won E., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   104 ( 9 )   2021.11( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.104.L091105

  • Precise Measurement of the D-0 and D+ Lifetimes at Belle II Reviewed

    Abudinen F., Adachi I, Adamczyk K., Aggarwal L., Ahmed H., Aihara H., Akopov N., Aloisio A., Ky N. Anh, Asner D. M., Atmacan H., Aushev V, Babu V, Bacher S., Bae H., Baehr S., Bahinipati S., Bambade P., Banerjee Sw, Bansal S., Barrett M., Baudot J., Bauer M., Baur A., Becker J., Behera P. K., Bennett J. V, Bernieri E., Bernlochner F. U., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bhardwaj V, Bianchi F., Bilka T., Bilokin S., Biswas D., Bobrov A., Bodrov D., Bolz A., Bozek A., Bracko M., Branchini P., Braun N., Briere R. A., Browder T. E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Chang M-C, Chang P., Cheaib R., Chekelian V, Chen C., Chen Y-T, Cheon B. G., Chilikin K., Chirapatpimol K., Cho H-E, Cho K., Cho S-J, Choi S-K, Choudhury S., Cinabro D., Corona L., Cremaldi L. M., Cunliffe S., Czank T., Dattola F., De la Cruz-Burelo E., de Marino G., De Nardo G., De Pietro G., de Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Di Canto A., Di Capua F., Dingfelder J., Dolezal Z., Dominguez Jimenez I, Dong T. V, Dorigo M., Dort K., Dossett D., Dubey S., Duell S., Dujany G., Ecker P., Epifanov D., Ferber T., Ferlewicz D., Finocchiaro G., Flood K., Fodor A., Forti F., Fulsom B. G., Gabrielli A., Gabyshev N., Gaz A., Gellrich A., Giakoustidis G., Giordano R., Giri A., Glazov A., Gobbo B., Godang R., Goldenzweig P., Golob B., Gradl W., Graziani E., Greenwald D., Gu T., Guan Y., Gudkova K., Guilliams J., Hadjivasiliou C., Halder S., Hara K., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hazra S., Hearty C., Heredia de la Cruz I, Villanueva M. Hernandez, Hershenhorn A., Higuchi T., Hill E. C., Hirata H., Hoek M., Hohmann M., Hsu C-L, Humair T., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jaffe D. E., Jang E-J, Jia S., Jin Y., Junkerkalefeld H., Kakuno H., Kaliyar A. B., Kandra J., Kang K. H., Karl R., Karyan G., Kato Y., Kawasaki T., Kiesling C., Kim C-H, Kim D. Y., Kim Y-K, Kim Y., Kimmel T. D., Kinoshita K., Kodys P., Koga T., Kohani S., Konno T., Korpar S., Kovalenko E., Kowalewski R., Kraetzschmar T. M. G., Krinner F., Krizan P., Krokovny P., Kuhr T., Kumar J., Kumar M., Kumar R., Kumara K., Kurz S., Kuzmin A., Kwon Y-J, Lacaprara S., Lalwani K., Lam T., Lanceri L., Lange J. S., Laurenza M., Lautenbach K., Le Diberder F. R., Lee S. C., Leitl P., Levit D., Li C., Li L. K., Libby J., Lieret K., Liptak Z., Liu Q. Y., Liventsev D., Longo S., Lueck T., Lyu C., Manfredi R., Manoni E., Marinas C., Martini A., Matsuda T., Matsuoka K., Matvienko D., McKenna J. A., Meier F., Merola M., Metzner F., Miller C., Miyabayashi K., Mizuk R., Mohanty G. B., Molina-Gonzalez N., Moon H., Moser H-G, Mrvar M., Murphy C., Mussa R., Nakamura I, Nakamura K. R., Nakao M., Nakazawa H., Natkaniec Z., Natochii A., Nazaryan G., Niebuhr C., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Onishchuk Y., Ono H., Onuki Y., Oskin P., Oxford E. R., Ozaki H., Pakhlov P., Paladino A., Pang T., Panta A., Paoloni E., Pardi S., Park H., Park S-H, Paschen B., Passeri A., Pathak A., Patra S., Paul S., Pedlar T. K., Peruzzi I, Peschke R., Pestotnik R., Pham F., Piccolo M., Piilonen L. E., Angioni G. Pinna, Podesta-Lerma P. L. M., Podobnik T., Pokharel S., Polat G., Popov V, Praz C., Prell S., Prencipe E., Prim M. T., Purohit M. V, Purwar H., Rad N., Rados P., Raiz S., Reiter S., Remnev M., Ripp-Baudot I, Rizzo G., Rizzuto L. B., Robertson S. H., Roney J. M., Rostomyan A., Rout N., Rozanska M., Sahoo D., Sanders D. A., Sandilya S., Sangal A., Santelj L., Sato Y., Savinov V, Scavino B., Schueler J., Schwanda C., Schwartz A. J., Seino Y., Selce A., Senyo K., Serrano J., Sfienti C., Shiu J-G, Shwartz B., Sibidanov A., Simon F., Sobie R. J., Soffer A., Sokolov A., Solovieva E., Spataro S., Spruck B., Staric M., Stefkova S., Stottler Z. S., Stroili R., Strube J., Sumihama M., Sutcliffe W., Suzuki S. Y., Svidras H., Tabata M., Takizawa M., Tamponi U., Tanaka S., Tanida K., Tanigawa H., Taniguchi N., Tenchini F., Tiwary R., Tonelli D., Torassa E., Toutounji N., Trabelsi K., Tsuboyama T., Ueda I, Uehara S., Uematsu Y., Uglov T., Unger K., Unno Y., Uno K., Uno S., Urquijo P., Ushiroda Y., Usov Y. V, Vahsen S. E., van Tonder R., Varner G. S., Vinokurova A., Vitale L., Vossen A., Waheed E., Wakeling H. M., Wang E., Wang M-Z, Wang X. L., Warburton A., Watanabe M., Welsch M., Wessel C., Wiechczynski J., Won E., Xu X. P., Yabsley B. D., Yamada S., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yoshihara K., Yusa Y., Zani L., Zhilich V, Zhou Q. D., Zhou X. Y., Zhukova V. I, Zlebcik R.

    PHYSICAL REVIEW LETTERS   127 ( 21 )   2021.11( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.127.211801

  • Search for B+ -> K+nu(nu)over-bar Decays Using an Inclusive Tagging Method at Belle H Reviewed

    Abudinen F., Adachi I, Adamczyk K., Ahlburg P., Aihara H., Akopov N., Aloisio A., Ky N. Anh, Asner D. M., Atmacan H., Aushev T., Aushev V, Baur A., Babu V, Baehr S., Bambade P., Banerjee Sw, Bansal S., Baudot J., Becker J., Behera P. K., Bennett J. V, Bernieri E., Bernlochner F. U., Bertemes M., Bertholet E., Bessner M., Bettarini S., Bianchi F., Bilka T., Biswas D., Bozek A., Bracko M., Branchini P., Braun N., Browder T. E., Budano A., Bussino S., Campajola M., Cao L., Casarosa G., Cecchi C., Cervenkov D., Chang P., Cheaib R., Chekelian V, Chen C., Chen Y-T, Cheon B. G., Chilikin K., Chirapatpimol K., Cho K., Cho S-J, Choudhury S., Cinabro D., Corona L., Cremaldi L. M., Cunliffe S., Czank T., Dattola F., De La Cruz-Burelo E., de Marino G., De Nardo G., De Nuccio M., De Pietro G., de Sangro R., Destefanis M., Dey S., De Yta-Hernandez A., Di Canto A., Di Capua F., Dingfelder J., Dolezal Z., Dominguez Jimenez I, Dong T. V, Dort K., Dubey S., Duell S., Dujany G., Eidelman S., Eliachevitch M., Epifanov D., Ferber T., Ferlewicz D., Fillinger T., Finocchiaro G., Fiore S., Fodor A., Forti F., Frey A., Fulsom B. G., Gabyshev N., Ganiev E., Garcia-Hernandez M., Garmash A., Gaur V, Gaz A., Gellrich A., Giordano R., Giri A., Glazov A., Gobbo B., Godang R., Goldenzweig P., Golob B., Grace P., Gradl W., Graziani E., Greenwald D., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Hara K., Hartbrich O., Hayasaka K., Hayashii H., Hazra S., Hearty C., Heredia de la Cruz I, Hernandez Villanueva M., Hershenhorn A., Higuchi T., Hill E. C., Hirata H., Hoek M., Hohmann M., Hsu C-L, Humair T., Iijima T., Inami K., Inguglia G., Jabbar J. Irakkathil, Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jackson P., Jacobs W. W., Jaffe D. E., Jin Y., Joo C., Junkerkalefeld H., Kaliyar A. B., Kandra J., Kang K. H., Karl R., Karyan G., Kawasaki T., Ketter C., Kichimi H., Kiesling C., Kim C-H, Kim D. Y., Kim Y-K, Kimmel T. D., Kodys P., Koga T., Kohani S., Konno T., Korobov A., Korpar S., Kovalenko E., Kraetzschmar T. M. G., Krinner F., Krizan P., Krokovny P., Kuhr T., Kumar J., Kumar M., Kumar R., Kumara K., Kunigo T., Kurz S., Kuzmin A., Kwon Y-J, Lacaprara S., Lai Y-T, La Licata C., Lanceri L., Lange J. S., Laurenza M., Lautenbach K., Le Diberder F. R., Lee S. C., Leitl P., Levit D., Lewis P. M., Li C., Li L. K., Li S. X., Li Y. B., Libby J., Lieret K., Liptak Z., Liu Q. Y., Liventsev D., Longo S., Lozar A., Lueck T., Lyu C., Maggiora M., Maity S., Manfredi R., Manoni E., Marcello S., Marinas C., Martini A., Masuda M., Matsuda T., Matsuoka K., Matvienko D., Meier F., Merola M., Metzner F., Milesi M., Miller C., Miyabayashi K., Miyake H., Mizuk R., Mohanty G. B., Moser H-G, Mrvar M., Muller F. J., Murphy C., Mussa R., Nakamura K. R., Nakao M., Natkaniec Z., Natochii A., Nayak M., Nazaryan G., Niebuhr C., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Onishchuk Y., Ono H., Onuki Y., Oskin P., Ozaki H., Pakhlov P., Pakhlova G., Paladino A., Pang T., Panta A., Paoloni E., Pardi S., Park H., Park S-H, Paschen B., Passeri A., Pathak A., Patra S., Paul S., Pedlar T. K., Peruzzi I, Pestotnik R., Piccolo M., Piilonen L. E., Podesta-Lerma P. L. M., Podobnik T., Pokharel S., Polat G., Popov V, Praz C., Prell S., Prencipe E., Prim M. T., Rad N., Rados P., Raiz S., Remnev M., Ripp-Baudot I, Ritter M., Rizzo G., Rizzuto L. B., Robertson S. H., Rodriguez Perez D., Roney J. M., Rostomyan A., Rout N., Russo G., Sahoo D., Sanders D. A., Sandilya S., Sangal A., Santelj L., Sato Y., Savinov V, Scavino B., Schueler J., Schwanda C., Schwartz A. J., Seddon R. M., Seino Y., Selce A., Senyo K., Serrano J., Sevior M. E., Sfienti C., Shiu J-G, Shwartz B., Sibidanov A., Simon F., Sobie R. J., Soffer A., Sokolov A., Solovieva E., Spataro S., Spruck B., Stefkova S., Stottler Z. S., Stroili R., Sumihama M., Sumisawa K., Summers D. J., Sutcliffe W., Suzuki S. Y., Svidras H., Tabata M., Takahashi M., Takizawa M., Tamponi U., Tanaka S., Tanida K., Tanigawa H., Taniguchi N., Taras P., Tenchini F., Tonelli D., Torassa E., Toutounji N., Trabelsi K., Uchida M., Unno Y., Uno K., Uno S., Urquijo P., Ushiroda Y., Usov Y. V, Vahsen S. E., van Tonder R., Varner G. S., Varvell K. E., Vinokurova A., Vitale L., Wach B., Waheed E., Wakeling H. M., Abdullah W. Wan, Wang M-Z, Wang X. L., Warburton A., Watanuki S., Webb J., Welsch M., Wessel C., Wiechczynski J., Windel H., Xu X. P., Yabsley B. D., Yamada S., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yook Y. M., Yoshihara K., Yuan C. Z., Yusa Y., Zani L., Zhilich V, Zhou Q. D., Zhou X. Y., Zhukova V. I

    PHYSICAL REVIEW LETTERS   127 ( 18 )   2021.10( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.127.181802

  • Measurement of the branching fraction of Lambda(+)(c) -> p omega decay at Belle Reviewed

    Li S. X., Li L. K., Shen C. P., Adachi I, Aihara H., Al Said S., Asner D. M., Aushev T., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bobrov A., Bodrov D., Borah J., Bozek A., Bracko M., Branchini P., Browder T. E., Budano A., Campajola M., Cervenkov D., Chang M-C, Chang P., Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dolezal Z., Dong T. V, Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Giri A., Goldenzweig P., Golob B., Graziani E., Gu T., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Hartbrich O., Hayasaka K., Hayashii H., Hou W-S, Hsu C-L, Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joo K. K., Kaliyar A. B., Kang K. H., Kato Y., Kichimi H., Kim C. H., Kim D. Y., Kim K-H, Kim K. T., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kumar R., Kumara K., Kwon Y-J, Lai Y-T, Lange J. S., Laurenza M., Lee S. C., Li J., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuda T., Merola M., Miyabayashi K., Mizuk R., Mussa R., Nakao M., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Ogawa S., Ono H., Oskin P., Pakhlov P., Pakhlova G., Pang T., Park H., Park S-H, Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sandilya S., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shiu J-G, Simon F., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Strube J. F., Sumihama M., Sumiyoshi T., Sutcliffe W., Takizawa M., Tamponi U., Tanida K., Tenchini F., Uchida M., Uglov T., Unno Y., Uno K., Uno S., Urquijo P., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang P., Won E., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   104 ( 7 )   2021.10( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.104.072008

  • Search for lepton-flavor-violating tau-lepton decays to l gamma at Belle Reviewed

    Uno K., Hayasaka K., Inami K., Adachi I, Aihara H., Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V, Bennett J., Bernlochner F., Bessner M., Bhardwaj V, Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Campajola M., Cervenkov D., Chang M-C, Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Dash N., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V, Eidelman S., Epifanov D., Ferber T., Frey A., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Hadjivasiliou C., Hara T., Hartbrich O., Hayashii H., Villanueva M. Hernandez, Hou W-S, Hsu C-L, Iijima T., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Jacobs W. W., Jin Y., Joo K. K., Kang K. H., Kato Y., Kichimi H., Kiesling C., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lai Y-T, Lange J. S., Lee S. C., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuoka K., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty G. B., Nakao M., Nakazawa H., Natochii A., Nayak L., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa K., Ogawa S., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park H., Park S-H, Paul S., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Sharma C., Shen C. P., Shiu J-G, Shwartz B., Simon F., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Sutcliffe W., Takizawa M., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uehara S., Uglov T., Unno Y., Uno S., Urquijo P., Ushiroda Y., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Vossen A., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang X. L., Werbycka O., Won E., Yabsley B. D., Yan W., Ye H., Yin J. H., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

    JOURNAL OF HIGH ENERGY PHYSICS   ( 10 )   2021.10( ISSN:1029-8479

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    DOI: 10.1007/JHEP10(2021)019

  • Measurements of the Branching Fractions of the Semileptonic Decays Xi(0)(c)-> Xi(-)l(+)nu(l) and the Asymmetry Parameter of Xi(0)(c) -> Xi(-)pi(+) Reviewed

    Li Y. B., Shen C. P., Adachi I, Adamczyk K., Aihara H., Al Said S., Asner D. M., Aushev T., Ayad R., Babu V, Behera P., Bennett J., Bessner M., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chang M-C, Chen A., Cheon B. G., Chilikin K., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Dhamija R., Di Capua F., Dong T. V, Eidelman S., Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Grzymkowska O., Gudkova K., Hadjivasiliou C., Hartbrich O., Hayasaka K., Hayashii H., Villanueva M. Hernandez, Hsu C-L, Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joo C. W., Joo K. K., Kang K. H., Karyan G., Kato Y., Kichimi H., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Lange J. S., Lee I. S., Lee S. C., Li C. H., Li L. K., Li Gioi L., Libby J., Lieret K., Liventsev D., Masuda M., Matvienko D., McNeil J. T., Metzner F., Mizuk R., Mohanty G. B., Moon T. J., Mori T., Mussa R., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Onuki Y., Pakhlov P., Pakhlova G., Pang T., Pardi S., Park H., Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Shapkin M., Sharma C., Shiu J-G, Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Tamponi U., Tanida K., Tenchini F., Uchida M., Uehara S., Uglov T., Uno K., Uno S., Usov Y., Van Tonder R., Varner G., Vinokurova A., Vossen A., Wang C. H., Wang M-Z, Wang P., Wang X. L., Watanabe M., Watanuki S., Won E., Xu X., Yan W., Yang S. B., Ye H., Yin J. H., Yuan C. Z., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW LETTERS   127 ( 12 )   2021.09( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.127.121803

  • Measurment of branching fractions and search for CP violation in D-0 -> pi(+)pi(-)eta, D-0 -> K+K-eta, and D-0 -> phi eta at Belle Reviewed International coauthorship

    Li L. K., Schwartz A. J., Kinoshita K., Adachi I, Aihara H., Al Said S., Asner D. M., Atmacan H., Aulchenko V, Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Bennett J., Bessner M., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Branchini P., Browder T. E., Budano A., Campajola M., Cervenkov D., Chang M-C, Chang P., Chekelian V, Chen A., Chen Y. Q., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dolezal Z., Dong T. V, Eidelman S., Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Giri A., Goldenzweig P., Golob B., Graziani E., Gu T., Guan Y., Hadjivasiliou C., Halder S., Hayasaka K., Hou W-S, Inami K., Ishikawa A., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E-J, Jia S., Jin Y., Joo K. K., Kang K. H., Karyan G., Kiesling C., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kim Y-K, Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Laurenza M., Lee S. C., Li C. H., Li Gioi L., Libby J., Lieret K., Liventsev D., Masuda M., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty G. B., Mori T., Nakao M., Natkaniec Z., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ono H., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park S-H, Passeri A., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Shapkin M., Sharma C., Shen C. P., Shiu J-G, Shwartz B., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Takizawa M., Tanida K., Tenchini F., Uchida M., Uglov T., Unno Y., Uno K., Uno S., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Waheed E., Wang C. H., Wang M-Z, Wang P., Wang X. L., Watanuki S., Won E., Yabsley B. D., Yan W. B., Yang S. B., Ye H., Yelton J., Yin J. H., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

    JOURNAL OF HIGH ENERGY PHYSICS   ( 9 )   2021.09( ISSN:1029-8479

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    DOI: 10.1007/JHEP09(2021)075

  • Evidence for the decay Omega(0)(c) -> pi(+)Omega(2012)(-) -> pi(+) (<(K)over bar Xi)(-) Reviewed

    Li Y., Tang S. S., Jia S., Shen C. P., Adachi I, Aihara H., Al Said S., Asner D. M., Atmacan H., Aulchenko V, Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Bessner M., Bilka T., Biswal J., Bozek A., Bracko M., Branchini P., Browder T. E., Budano A., Campajola M., Cervenko D., Chang M-C, Chang P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S-J, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., De Pietro G., Di Capua F., Dolezal Z., Dong T. V, Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Giri A., Goldenzweig P., Golob B., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Halder S., Hayasaka K., Hayashii H., Hou W-S, Inami K., Ishikawa A., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E-J, Jin Y., Joo K. K., Kang K. H., Karyan G., Kiesling C., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Laurenza M., Lee S. C., Li C. H., Li L. K., Li Gioi L., Libby J., Lieret K., Liventsev D., Masuda M., Matsuda T., Matvienko D., McNeil J. T., Merola M., Miyabayashi K., Mizuk R., Mohanty G. B., Mori T., Mussa R., Nakao M., Natkaniec Z., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park S-H, Passeri A., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Shapkin M., Sharma C., Shebalin V, Shiu J-G, Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Sutcliffe W., Takizawa M., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno K., Uno S., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang P., Watanuki S., Werbycka O., Won E., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yuan C. Z., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   104 ( 5 )   2021.09( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.104.052005

  • Measurement of the masses and widths of the Sigma(c)(2455)(+) and Sigma(c)(2520)(+) baryons Reviewed

    Yelton J., Adachi I, Ahn J. K., Aihara H., Al Said S., Asner D. M., Atmacan H., Aulchenko V, Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bozek A., Bracko M., Branchini P., Browder T. E., Budano A., Campajola M., Cervenkov D., Chang M-C, Chang P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V, Epifanov D., Ferber T., Ferlewicz D., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hou W-S, Hsu C-L, Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joo K. K., Kaliyar A. B., Kang K. H., Kato Y., Kiesling C., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kumara K., Kwon Y-J, Lange J. S., Laurenza M., Lee S. C., Li J., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuda T., Matvienko D., McNeil J. T., Merola M., Miyabayashi K., Mizuk R., Mohanty G. B., Moon T. J., Mussa R., Nakao M., Natkaniec Z., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park H., Park S-H, Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shen C. P., Shiu J-G, Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Sumisawa K., Sumiyoshi T., Takizawa M., Tamponi U., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Waheed E., Wang C. H., Wang D., Wang E., Wang M-Z, Wang P., Watanabe M., Watanuki S., Won E., Yabsley B. D., Yan W., Yang S. B., Ye H., Yin J. H., Yuan C. Z., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   104 ( 5 )   2021.09( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.104.052003

  • Search for the decay B-s(0) -> eta 'eta Reviewed

    Nisar N. K., Savinov V, Adachi I, Aihara H., Al Said S., Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Bennett J., Bessner M., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bonvicini G., Bozek A., Browder T. E., Campajola M., Chang M-C, Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Dhamija R., Di Capua F., Dolezal Z., Dong T. V, Dubey S., Eidelman S., Epifanov D., Ferber T., Ferlewicz D., Frey A., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hedges M. T., Hsu C-L, Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joo C. W., Joo K. K., Kahn J., Kaliyar A. B., Kang K. H., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim C. H., Kim D. Y., Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Lange J. S., Lee S. C., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Mizuk R., Mohanty G. B., Mohanty S., Nakao M., Natochii A., Nayak L., Nayak M., Nishida S., Nishimura K., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pang T., Pardi S., Park H., Park S-H, Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sandilya S., Sangal A., Santelj L., Sanuki T., Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shen C. P., Shiu J-G, Shwartz B., Simon F., Solovieva E., Stanic S., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Takizawa M., Tamponi U., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Urquijo P., Van Tonder R., Varner G., Vossen A., Waheed E., Wang C. H., Wang M-Z, Wang P., Wang X. L., Watanuki S., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   104 ( 3 )   2021.08( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.104.L031101

  • Search for the eta(c2) (1D) in e(+) e(-) -> gamma eta(c2)(1D) at root s near 10.6 GeV at Belle Reviewed

    Jia S., Shen C. P., Adachi I, Aihara H., Al Said S., Asner D. M., Aushev T., Ayad R., Babu V, Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Branchini P., Browder T. E., Budano A., Campajola M., Cervenkov D., Chang M-C, Chang P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dolezal Z., Dong T. V, Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Halder S., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hou W-S, Hsu C-L, Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jin Y., Joo K. K., Kaliyar A. B., Kang K. H., Karyan G., Kato Y., Kawasaki T., Kiesling C., Kim D. Y., Kim K-H, Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Lange J. S., Laurenza M., Lee S. C., Li C. H., Li J., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Miyabayashi K., Miyata H., Mizuk R., Mussa R., Nakao M., Natkaniec Z., Natochii A., Nayak L., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park S-H, Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rostomyan A., Rout N., Russo G., Sahoo D., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shiu J-G, Shwartz B., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Takizawa M., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uglov T., Unno Y., Uno K., Uno S., Urquijo P., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang P., Watanuki S., Werbycka O., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yuan C. Z., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   104 ( 1 )   2021.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.104.012012

  • Measurements of partial branching fractions of inclusive B -> XTI4PFTI4PF(u)(lx+)nu(l) decays with hadronic tagging Reviewed

    Cao L., Sutcliffe W., Van Tonder R., Bernlochner F. U., Adachi I, Aihara H., Al Said S., Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V, Bauer M., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V, Bilka T., Biswal J., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chang M-C, Chang P., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V, Dubey S., Eidelman S., Epifanov D., Ferber T., Ferlewicz D., Frey A., Fulsom B. G., Garg R., Gaur V, Garmash A., Giri A., Goldenzweig P., Guan Y., Hadjivasiliou C., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hedges M. T., Villanueva M. Hernandez, Hou W-S, Hsu C-L, Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E-J, Jeon H. B., Jia S., Jin Y., Joo C. W., Joo K. K., Kang K. H., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim B. H., Kim C. H., Kim D. Y., Kim H. J., Kim K-H, Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kotchetkov D., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Lange J. S., Lee I. S., Lee S. C., Lewis P., Li C. H., Li J., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liptak Z., Liventsev D., MacNaughton J., MacQueen C., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty G. B., Moon T. J., Mori T., Mrvar M., Mussa R., Nakao M., Natkaniec Z., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pang T., Pardi S., Park C. W., Park H., Park S-H, Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Ritter M., Rohrken M., Rostomyan A., Rout N., Rozanska M., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Schwartz A. J., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shen C. P., Shiu J-G, Simon F., Sokolov A., Solovieva E., Stanic S., Staric M., Stottler Z. S., Strube J. F., Sumiyoshi T., Takizawa M., Tamponi U., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Vahsen S. E., Varner G., Varvell K. E., Vinokurova A., Vorobyev V., Vossen A., Waheed E., Wang C. H., Wang E., Wang M-Z, Wang P., Watanabe M., Watanuki S., Wehle S., Wiechczynski J., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yin J. H., Yuan C. Z., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V, Zhulanov V

    PHYSICAL REVIEW D   104 ( 1 )   2021.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.104.012008

  • Search for B-s(0) -> eta'Xs(s)over-bar at Belle using a semi-inclusive method Reviewed

    Dubey S., Browder T. E., Aihara H., Al Said S., Asner D. M., Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Bennett J., Bessner M., Bhuyan B., Bilokin S., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Campajola M., Cervenkov D., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dhamija R., Di Capua F., Dolezal Z., Dossett D., Eidelman S., Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Greenwald D., Guan Y., Gudkova K., Hadjivasiliou C., Hayasaka K., Hayashii H., Hedges M. T., Hou W-S, Hsu C-L, Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jang E-J, Jin Y., Joo C. W., Joo K. K., Kaliyar A. B., Kawasaki T., Kichimi H., Kim C. H., Kim D. Y., Kim S. H., Kim Y-K, Kimmel T. D., Kinoshita K., Korpar S., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kumar R., Kumara K., Kwon Y-J, Lalwani K., Lange J. S., Lee S. C., Li C. H., Li J., Li L. K., Li Y. B., Li Gioi L., Libby J., Liventsev D., MacQueen C., Masuda M., Matsuda T., Merola M., Metzner F., Miyabayashi K., Mizuk R., Mohanty G. B., Mohanty S., Moon T. J., Nakao M., Natochii A., Nayak L., Nayak M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlova G., Pardi S., Park S-H, Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shiu J-G, Shwartz B., Solovieva E., Staric M., Stottler Z. S., Strube J. F., Sumisawa K., Takizawa M., Tamponi U., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Unno Y., Uno S., Ushiroda Y., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Wang C. H., Wang E., Wang P., Watanabe M., Watanuki S., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yin J. H., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   104 ( 1 )   2021.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.104.012007

  • Measurements of branching fractions and asymmetry parameters of Xi(0)(c) -> Lambda(K)over-bar*(0), Xi(0)(c) -> Sigma(0)(K)over-bar*(0), and Xi(0)(c) -> Sigma(+) K*(-) decays at Belle Reviewed

    Jia S., Tang S. S., Shen C. P., Adachi I., Aihara H., Al Said S., Asner D. M., Aulchenko V., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Bennett J., Bessner M., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chang M. -C., Chekelian V., Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S. -J., Choi S. -K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., De Nardo G., Dhamija R., Di Capua F., Dolezal Z., Dong T. V., Eidelman S., Epifanov D., Ferber T., Flood K., Fulsom B. G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Hartbrich O., Hayasaka K., Hayashii H., Hou W. -S., Hsu C. -L., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jin Y., Joo K. K., Karyan G., Kato Y., Kichimi H., Kim C. H., Kim D. Y., Kim K. -H., Kim S. H., Kim Y. -K., Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumara K., Kuzmin A., Kwon Y. -J., Lalwani K., Lange J. S., Lee S. C., Li J., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuda T., Matvienko D., McNeil J. T., Merola M., Metzner F., Miyabayashi K., Miyata H., Mizuk R., Mohanty G. B., Mussa R., Nakao M., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa K., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park H., Park S. -H., Patra S., Paul S., Pestotnik R., Piilonen L. E., Podobnik T., Popov V., Prencipe E., Prim M. T., Rostomyan A., Rout N., Russo G., Sahoo D., Sandilya S., Sangal A., Savinov V., Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Sharma C., Shiu J. -G., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Takizawa M., Tanida K., Tenchini F., Trabelsi K., Uehara S., Uglov T., Unno Y., Uno K., Uno S., Urquijo P., Usov Y., Van Tonder R., Varner G., Waheed E., Wang C. H., Wang M. -Z., Wang P., Watanabe M., Werbycka O., Won E., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yuan C. Z., Yusa Y., Zhang Z. P., Zhilich V., Zhukova V.

    JOURNAL OF HIGH ENERGY PHYSICS   ( 6 )   2021.06( ISSN:1029-8479

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    DOI: 10.1007/JHEP06(2021)160

  • Measurement of the energy dependence of the e(+) e(-) -> B(B)over-bar, B (B)over-bar* and B*(B)over-bar* exclusive cross sections Reviewed

    Mizuk R., Bondar A., Adachi I, Aihara H., Al Said S., Asner D. M., Atmacan H., Aulchenko V, Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Belous K., Bennett J., Bessner M., Bilka T., Biswal J., Bobrov A., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chang M-C, Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Dhamija R., Di Capua F., Dingfelder J., Dolezal Z., Eidelman S., Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Garmash A., Goldenzweig P., Golob B., Hadjivasiliou C., Hayasaka K., Hayashii H., Hedges M. T., Hou W-S, Hsu C-L, Huang K., Iijima T., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E-J, Jia S., Jin Y., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim C. H., Kim D. Y., Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumara K., Kuzmin A., Kwon Y-J, Lee S. C., Lewis P., Li J., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Miyabayashi K., Mohanty G. B., Mrvar M., Mussa R., Nakao M., Natochii A., Nayak L., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pang T., Pardi S., Park H., Park S-H, Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Roehrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Senyo K., Sharma C., Shen C. P., Shiu J-G, Shwartz B., Sokolov A., Solovieva E., Stanic S., Staric M., Stottler Z. S., Sumiyoshi T., Takizawa M., Tamponi U., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uehara S., Uglov T., Unno Y., Uno K., Uno S., Usov Y., Van Tonder R., Varner G., Waheed E., Wang C. H., Wang M-Z, Wang P., Watanabe M., Watanuki S., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yin J. H., Yuan C. Z., Zhang Z. P., Zhilich V, Zhukova V

    JOURNAL OF HIGH ENERGY PHYSICS   ( 6 )   2021.06( ISSN:1029-8479

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    DOI: 10.1007/JHEP06(2021)137

  • First determination of the spin and parity of the charmed-strange baryon Ξc(2970)+ Reviewed

    T. J. Moon, K. Tanida, Y. Kato, S. K. Kim, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, C. Beleño, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, Z. Doležal, T. V. Dong, D. Dossett, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W.-S. Hou, C.-L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, Y.-K. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, I. S. Lee, J. Y. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, Z. Liptak, D. Liventsev, T. Luo, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, T. Mori, R. Mussa, T. Nakano, M. Nakao, Z. Natkaniec, A. Natochii, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Ritter, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, R. Seidl, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J.-G. Shiu, B. Shwartz, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, K. Sumisawa, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, S. Wehle, J. Wiechczynski, X. Xu, B. D. Yabsley, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    American Physical Society (APS) Physical Review D   103 ( 11 )   2021.06( ISSN:2470-0010

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    DOI: 10.1103/physrevd.103.l111101

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  • Measurement of branching fractions and CP asymmetries for Ds+→K+(η,π0) and Ds+→π+(η,π0) decays at Belle Reviewed

    Y. Guan, A. J. Schwartz, K. Kinoshita, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M.-C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y.-K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, M. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Mrvar, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. V. Purohit, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, F. Simon, J. B. Singh, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, M. Sumihama, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, T. Uglov, Y. Unno, S. Uno, P. Urquijo, R. Van Tonder, G. Varner, A. Vossen, E. Waheed, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, S. Watanuki, O. Werbycka, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova

    American Physical Society (APS) Physical Review D   103 ( 11 )   2021.06( ISSN:2470-0010

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    DOI: 10.1103/physrevd.103.112005

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.103.112005/fulltext

  • Measurement of the resonant and nonresonant branching ratios in $\Xi_{c}^{0} \rightarrow \Xi^{0} K^+ K^-$ Reviewed

    McNeil, J.T., Yelton, J., Bennett, J., Adachi, I., Adamczyk, K., Ahn, J.K., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Bessner, M., Bilka, T., Biswal, J., Bobrov, A., Bonvicini, G., Bozek, A., Bracko, M., Browder, T.E., Campajola, M., Cao, L., Cervenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B.G., Chilikin, K., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., Dash, N., De Nardo, G., Dhamija, R., Di Capua, F., Dolezal, Z., Dong, T.V., Eidelman, S., Ferber, T., Fulsom, B.G., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Golob, B., Grzymkowska, O., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hou, W.S., Hsu, C.L., Huang, K., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W.W., Jeon, H.B., Jia, S., Jin, Y., Joo, K.K., Kaliyar, A.B., Kang, K.H., Karyan, G., Kichimi, H., Kim, B.H., Kim, C.H., Kim, D.Y., Kim, S.H., Kim, Y.K., Kinoshita, K., Kodys, P., Konno, T., Korpar, S., Krizan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, M., Kumara, K., Kwon, Y.J., Lalwani, K., Lee, S.C., Li, J., Li, L.K., Li, Y.B., Li Gioi, L., Libby, J., Lieret, K., Liptak, Z., Liventsev, D., MacQueen, C., Masuda, M., Matsuda, T., Matvienko, D., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Mohanty, S., Moon, T.J., Mussa, R., Nakao, M., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N.K., Nishida, S., Ogawa, K., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Paul, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Popov, V., Prencipe, E., Prim, M.T., Rohrken, M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sakai, Y., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shebalin, V., Shiu, J.G., Simon, F., Solovieva, E., Staric, M., Stottler, Z.S., Strube, J.F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tao, Y., Tenchini, F., Uchida, M., Uehara, S., Unno, Y., Uno, S., Van Tonder, R., Varner, G., Vinokurova, A., Vorobyev, V., Wang, C.H., Wang, E., Wang, M.Z., Wang, P., Watanabe, M., Watanuki, S., Won, E., Xu, X., Yabsley, B.D., Yan, W., Ye, H., Yin, J.H., Zhang, Z.P., Zhilich, V., Zhukova, V.

    Phys.Rev.D   103 ( 11 )   112002 - 112002   2021.06( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.103.112002

  • Measurement of the branching fraction of the decay B+ -> pi(+) pi(-) l(+) nu(l) in fully reconstructed events at Belle Reviewed International coauthorship

    Beleno C., Frey A., Adachi I, Aihara H., Asner D. M., Atmacan H., Aushev T., Ayad R., Behera P., Bennett J., Bernlochner F., Bhardwaj V, Bilka T., Biswal J., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chang P., Chen A., Chilikin K., Cho K., Choi Y., Cinabro D., Cunliffe S., Dash N., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V, Eidelman S., Epifanov D., Fast J. E., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Guan Y., Hartbrich O., Hayasaka K., Hayashii H., Hou W-S, Inami K., Ishikawa A., Iwasaki M., Jacobs W. W., Jeon H. B., Jin Y., Joo K. K., Kiesling C., Kim B. H., Kim D. Y., Kim K-H, Kim S. H., Kim Y-K, Kimmel T. D., Kinoshita K., Kodys P., Korpar S., Kotchetkov D., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kumar R., Kuzmin A., Kwon Y-J, Lalwani K., Lee S. C., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., Luo T., MacNaughton J., MacQueen C., Masuda M., Matsuda T., Merola M., Miyabayashi K., Mohanty G. B., Moon T. J., Mori T., Mrvar M., Nakao M., Nisar N. K., Nishida S., Ogawa S., Ono H., Oskin P., Pakhlov P., Pakhlova G., Pardi S., Park H., Patra S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Sanuki T., Savinov V, Schnell G., Schwanda C., Schwartz A. J., Schwenker B., Seino Y., Senyo K., Sevior M. E., Shapkin M., Shiu J-G, Shwartz B., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Strube J. F., Sumiyoshi T., Sutcliffe W., Takizawa M., Tanida K., Tenchini F., Uchida M., Uglov T., Uno S., Urquijo P., Vahsen S. E., Van Tonder R., Varner G., Varvell K. E., Wang C. H., Wang E., Wang M-Z, Wang P., Wang X. L., Watanabe M., Won E., Xu X., Yan W., Yang S. B., Ye H., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   103 ( 11 )   2021.06( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.103.112001

  • Test of Lepton-Flavor Universality in B -> K*l(+)l(-) Decays at Belle Reviewed

    Wehle S., Adachi I, Adamczyk K., Aihara H., Asner D. M., Atmacan H., Aulchenko V, Aushev T., Ayad R., Babu V, Behera P., Berger M., Bhardwaj V, Biswal J., Bozek A., Browder T. E., Campajola M., Cao L., Chang M-C, Chen A., Cheon B. G., Chilikin K., Cho K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Dash N., De Nardo G., Di Capua F., Dubey S., Eidelman S., Epifanov D., Ferber T., Fulsom B. G., Garg R., Gaur V, Gabyshev N., Garmash A., Giri A., Goldenzweig P., Greenwald D., Guan Y., Haba J., Hartbrich O., Hayasaka K., Hayashii H., Hedges M. T., Higuchi T., Hou W-S, Hsu C-L, Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joffe D., Kahn J., Kaliyar A. B., Karyan G., Kichimi H., Kim D. Y., Kim K. T., Kim S. H., Kim Y-K, Kinoshita K., Komarov I, Korpar S., Kotchetkov D., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kumar R., Kumara K., Kuzmin A., Kwon Y-J, Lange J. S., Lee J. Y., Lee S. C., Li Y. B., Libby J., Liptak Z., Liventsev D., Luo T., MacNaughton J., Masuda M., Matsuda T., McNeil J. T., Merola M., Metzner F., Miyata H., Mizuk R., Mohanty G. B., Moon T. J., Mussa R., Nakao M., Natochii A., Nayak M., Niebuhr C., Niiyama M., Nisar N. K., Nishida S., Ogawa K., Ogawa S., Ono H., Onuki Y., Pakhlov P., Pakhlova G., Park H., Park S-H, Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Resmi P. K., Ritter M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Savinov V, Schneider O., Schnell G., Schueler J., Schwanda C., Schwartz A. J., Seino Y., Senyo K., Sevior M. E., Shapkin M., Shiu J-G, Shwartz B., Solovieva E., Strube J. F., Sumiyoshi T., Sutcliffe W., Takizawa M., Tamponi U., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Ushiroda Y., Vahsen S. E., Van Tonder R., Varner G., Varvell K. E., Vorobyev V., Wang C. H., Wang M-Z, Wang P., Wang X. L., Won E., Xu X., Yang S. B., Ye H., Yin J. H., Yuan C. Z., Zhang Z. P., Zhilich V, Zhukova V, Zhulanov V

    PHYSICAL REVIEW LETTERS   126 ( 16 )   2021.04( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.126.161801

  • Search for the dark photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle Reviewed

    Li Y., Li Y. B., Shen C. P., Adachi I., Aihara H., Asner D. M., Atmacan H., Aulchenko V., Ayad R., Babu V., Badhrees I., Bakich A. M., Behera P., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cao L., Cervenkov D., Chang P., Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi S. -K., Choi Y., Cinabro D., Cunliffe S., De Nardo G., Di Capua F., Di Carlo S., Dolezal Z., Dong T. V., Eidelman S., Fast J. E., Ferber T., Ferlewicz D., Fulsom B. G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Grube B., Hara T., Hayasaka K., Hayashii H., Hou W. -S., Hsu C. -L., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jia S., Jin Y., Joo K. K., Kang K. H., Karyan G., Kichimi H., Kim C. H., Kim D. Y., Kim S. H., Kinoshita K., Kodys P., Korpar S., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A., Kwon Y. -J., Lalwani K., Lange J. S., Lee I. S., Lee S. C., Lewis P., Li C. H., Li L. K., Gioi L. Li, Libby J., Lieret K., Liventsev D., MacQueen C., Masuda M., Matsuda T., Matvienko D., Merola M., Miyata H., Mizuk R., Mussa R., Nakao M., Nath K. J., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Onuki Y., Oskin P., Pakhlov P., Pakhlova G., Pang T., Pardi S., Park H., Park S. -H., Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V., Prencipe E., Prim M. T., Roehrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Santelj L., Savinov V., Schneider O., Schnell G., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shiu J. -G., Shwartz B., Sokolov A., Solovieva E., Stanic S., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Sutcliffe W., Takizawa M., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Van Tonder R., Varner G., Vinokurova A., Wang C. H., Wang M. -Z., Wang X. L., Watanabe M., Won E., Yang S. B., Ye H., Yelton J., Yin J. H., Yuan C. Z., Zhang Z. P., Zhilich V., Zhukova V., Zhulanov V.

    JOURNAL OF HIGH ENERGY PHYSICS   ( 4 )   2021.04( ISSN:1029-8479

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    DOI: 10.1007/JHEP04(2021)191

  • Measurements of the branching fractions of Lambda(+)(c) -> p eta and Lambda(+)(c) -> p pi(0) decays at Belle Reviewed

    Li S. X., Shen C. P., Adachi I, Ahn J. K., Aihara H., Asner D. M., Aushev T., Ayad R., Babu V, Bahinipati S., Behera P., Bennett J., Bernlochner F., Bessner M., Bhardwaj V, Bhuyan B., Bilka T., Biswal J., Bobrov A., Bozek A., Browder T. E., Campajola M., Cao L., Chang M-C, Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Dhamija R., Di Capua F., Dolezal Z., Dong T. V, Eidelman S., Epifanov D., Ferber T., Ferlewicz D., Fulsom B. G., Garg R., Gaur V, Garmash A., Giri A., Goldenzweig P., Golob B., Grzymkowska O., Gudkova K., Hadjivasiliou C., Hartbrich O., Hayasaka K., Hayashii H., Hedges M. T., Hou W-S, Hsu C-L, Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E-J, Jia S., Jin Y., Joo C. W., Joo K. K., Kaliyar A. B., Kang K. H., Karyan G., Kato Y., Kawasaki T., Kichimi H., Kim B. H., Kim C. H., Kim D. Y., Kim K-H, Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumara K., Kuzmin A., Kwon Y-J, Lalwani K., Lange J. S., Lee I. S., Lee S. C., Li C. H., Li L. K., Li Y. B., Li Gioi L., Libby J., Lieret K., Liventsev D., Masuda M., Matsuda T., Matvienko D., Merola M., Metzner F., Mizuk R., Mohanty S., Mori T., Nakao M., Natkaniec Z., Natochii A., Nayak L., Niiyama M., Nisar N. K., Nishida S., Ono H., Onuki Y., Pakhlov P., Pakhlova G., Pang T., Pardi S., Park H., Park S-H, Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Santelj L., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shebalin V, Shiu J-G, Shwartz B., Solovieva E., Stottler Z. S., Sumihama M., Sumiyoshi T., Sutcliffe W., Takizawa M., Tanida K., Tao Y., Tenchini F., Trabelsi K., Uchida M., Uehara S., Uglov T., Uno K., Uno S., Urquijo P., Van Tonder R., Varner G., Vossen A., Wang C. H., Wang E., Wang M-Z, Wang P., Watanuki S., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yuan C. Z., Yusa Y., Zhang Z. P., Zhilich V, Zhukova V, Zhulanov V

    PHYSICAL REVIEW D   103 ( 7 )   2021.04( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.103.072004

  • Measurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-) l(+) nu(l) at Belle (vol 100, 052007, 2019) Reviewed

    Waheed E., Urquijo P., Ferlewicz D., Adachi I., Adamczyk K., Aihara H., Al Said S., Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V., Badhrees I., Bansal V., Behera P., Beleno C., Bernlochner F., Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chang P., Chekelian V., Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Di Carlo S., Dolezal Z., Dong T. V., Dossett D., Eidelman S., Epifanov D., Fast J. E., Fulsom B. G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Golob B., Grzymkowska O., Haba J., Hara T., Hayasaka K., Hayashii H., Hedges T., Hou W-S, Hsu C-L, Iijima T., Inami K., Inguglia G., Ishikawa A., Iwasaki M., Iwasaki Y., Jacobs W. W., Jeon H. B., Jia S., Jin Y., Joffe D., Joo K. K., Kahn J., Kaliyar A. B., Karyan G., Kawasaki T., Kim C. H., Kim D. Y., Kim K. T., Kim S. H., Kinoshita K., Kodys P., Korpar S., Kotchetkov D., Krizan P., Kroeger R., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A., Kwon Y-J, Lange J. S., Lee J. Y., Lee S. C., Li C. H., Li L. K., Li Y. B., Gioi L. Li, Libby J., Lieret K., Liventsev D., Lu P-C, Luo T., MacNaughton J., Masuda M., Matvienko D., Merola M., Metzner F., Miyabayashi K., Miyata H., Mizuk R., Mohanty G. B., Mori T., Mussa R., Nakamura I., Nakao M., Nath K. J., Natkaniec Z., Nayak M., Niiyama M., Nisar N. K., Nishida S., Nishimura K., Ogawa S., Ono H., Pakhlov P., Pakhlova G., Pal B., Pardi S., Park H., Park S-H, Paul S., Pestotnik R., Piilonen L. E., Popov V., Prencipe E., Prim M., Rostomyan A., Russo G., Sakai Y., Salehi M., Sandilya S., Sanuki T., Savinov V., Schneider O., Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Seon O., Sevior M. E., Shebalin V., Shen C. P., Shiu J-G, Shwartz B., Simon F., Sokolov A., Solovieva E., Stanic S., Staric M., Stottler Z. S., Strube J. F., Sumiyoshi T., Takizawa M., Tanida K., Tenchini F., Trabelsi K., Uchida M., Uglov T., Unno Y., Uno S., Usov Y., Varner G., Varvell K. E., Vinokurova A., Vossen A., Wang C. H., Wang M-Z, Wang P., Won E., Yang S. B., Ye H., Yusa Y., Zhang Z. P., Zhilich V., Zhukova V.

    PHYSICAL REVIEW D   103 ( 7 )   2021.04( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.103.079901

  • Measurement of branching fraction and search for CP violation in B -> phi phi K Reviewed

    Mohanty S., Kaliyar A. B., Gaur V, Mohanty G. B., Adachi I, Adamczyk K., Aihara H., Said S. Al, Asner D. M., Atmacan H., Aulchenko V, Aushev T., Aziz T., Babu V, Bahinipati S., Behera P., Bessner M., Bhardwaj V, Bilka T., Biswal J., Bobrov A., Bozek A., Bracko M., Browder T. E., Campajola M., Cervenkov D., Chekelian V, Chen A., Cheon B. G., Chilikin K., Cho K., Cho S-J, Choi S-K, Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Dhamija R., Capua F. Di, Dolezal Z., Dong T. V, Eidelman S., Ferber T., Fulsom B. G., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Grzymkowska O., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Hayasaka K., Hayashii H., Hou W-S, Hsu C-L, Inami K., Ishikawa A., Itoh R., Iwasaki M., Jacobs W. W., Jeon H. B., Jia S., Jin Y., Joo K. K., Kang K. H., Karyan G., Kim B. H., Kim C. H., Kim D. Y., Kim S. H., Kim Y-K, Kinoshita K., Kodys P., Konno T., Korpar S., Kotchetkov D., Krizan P., Krokovny P., Kulasiri R., Kumar M., Kumar R., Kumara K., Kwon Y-J, Lalwani K., Lee S. C., Li J., Li L. K., Li Y. B., Gioi L. Li, Libby J., Liptak Z., Liventsev D., MacQueen C., Masuda M., Matsuda T., Merola M., Miyabayashi K., Mizuk R., Moon T. J., Mussa R., Nakao M., Natochii A., Nayak L., Nayak M., Nishida S., Ogawa K., Ogawa S., Onuki Y., Oskin P., Pakhlova G., Pardi S., Park C. W., Park H., Park S-H, Patra S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Popov V, Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sakai Y., Sandilya S., Sangal A., Sanuki T., Savinov V, Schnell G., Schueler J., Schwanda C., Schwartz A. J., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shiu J-G, Shwartz B., Simon F., Solovieva E., Staric M., Stottler Z. S., Strube J. F., Sumiyoshi T., Takizawa M., Tanida K., Tao Y., Tenchini F., Uchida M., Unno Y., Uno S., Usov Y., Vahsen S. E., Van Tonder R., Varner G., Varvell K. E., Vinokurova A., Vorobyev V., Wang C. H., Wang E., Wang M-Z, Wang P., Wang X. L., Watanuki S., Wiechczynski J., Won E., Xu X., Yabsley B. D., Yan W., Ye H., Yin J. H., Zhang Z. P., Zhilich V, Zhukova V

    PHYSICAL REVIEW D   103 ( 5 )   2021.03( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.103.052013

  • Evidence for X(3872)→J/ψπ+π− produced in single-tag two-photon interactions Reviewed International coauthorship

    Y. Teramoto, S. Uehara, M. Masuda, et. al. [Belle Collaboration]

    Phys.Rev.Lett.   126 ( 12 )   122001   2021.03

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    DOI: 10.1103/PhysRevLett.126.122001

  • Measurement of branching fractions of Λ+c→ηΛπ+, ηΣ0π+, Λ(1670)π+, and ηΣ(1385)+ Reviewed International coauthorship

    J.Y. Lee, K. Tanida, Y. Kato, S.K. Kim, S.B. Yang, et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   103 ( 5 )   052005   2021.03

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    DOI: 10.1103/PhysRevD.103.052005

  • Test of lepton flavor universality and search for lepton flavor violation in B -> Kll decays Reviewed International coauthorship

    Li Y., Li Y. B., Shen C. P., et. al. [Belle Collaboration]

    JOURNAL OF HIGH ENERGY PHYSICS   ( 2103 )   105   2021.03( ISSN:1029-8479

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    DOI: 10.1007/JHEP03(2021)105

  • Measurement of time-dependent CP violation parameters in B-0 -> (KSKSKS0)-K-0-K-0 decays at Belle Reviewed International coauthorship

    Kang K. H., Park H., Higuchi T., Miyabayashi K., Sumisawa K., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   103 ( 3 )   032003   2021.02( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.103.032003

  • Search for lepton-number- and baryon-number-violating tau decays at Belle Reviewed International coauthorship

    Sahoo D., Mohanty G. B., Trabelsi K., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   102 ( 11 )   111101   2020.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.102.111101

  • Search for a doubly charged DDK bound state in Upsilon(1S, 2S) inclusive decays and via direct production in e(+)e(-) collisions at root s=10.520, 10.580, and 10.867 GeV Reviewed

    Li Y., Jia S., Shen C. P., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   102 ( 11 )   112001   2020.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.102.112001

  • Search for transitions from Upsilon(4S) and Upsilon(5S) to eta(b) (1S) and eta(b) (2S) with emission of an omega meson Reviewed

    Yelton J., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   102 ( 9 )   092011   2020.11( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.102.092011

  • Study of electromagnetic decays of orbitally excited Xi(c) baryons Reviewed

    Yelton J., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   102 ( 7 )   071103   2020.10( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.102.071103

  • Measurement of the charm-mixing parameter y(CP) in D-0 -> K-S(0)omega decays at Belle Reviewed

    Nayak M., Cinabro D., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   102 ( 7 )   071102   2020.10( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.102.071102

  • Search for B-0 decays to invisible final states ( plus gamma) at Belle Reviewed

    Ku Y., Chang P., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   102 ( 1 )   012003   2020.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.102.012003

  • Dalitz analysis of D-0 -> K- pi(+)eta decays at Belle Reviewed

    Chen Y. Q., Li L. K., Yan W. B., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   102 ( 1 )   012002   2020.07( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.102.012002

  • Update of inclusive cross sections of single and pairs of identified light charged hadrons Reviewed

    R. Seidl, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, I. Badhrees, P. Behera, K. Belous, J. Bennett, B. Bhuyan, J. Biswal, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, V. Chekelian, A. Chen, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, K. Hayasaka, H. Hayashii, W.-S. Hou, K. Huang, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, G. Karyan, D. Y. Kim, S. H. Kim, P. Kodyš, S. Korpar, P. Križan, R. Kroeger, P. Krokovny, A. Kuzmin, Y.-J. Kwon, S. C. Lee, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, R. Mussa, M. Nakao, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Ritter, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, M. E. Sevior, M. Shapkin, V. Shebalin, J.-G. Shiu, B. Shwartz, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, Y. Usov, R. Van Tonder, G. Varner, V. Vorobyev, A. Vossen, C. H. Wang, M.-Z. Wang, P. Wang, S. Watanuki, E. Won, X. Xu, S. B. Yang, J. Yelton, Z. P. Zhang, V. Zhilich, V. Zhukova

    American Physical Society (APS), Physical Review D   101 ( 9 )   2020.05( ISSN:2470-0010

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    We report new measurements of the production cross sections of pairs of
    charged pions and kaons as a function of their fractional energies using
    various fractional-energy definitions. Two different fractional-energy
    definitions were used and compared to the conventional fractional-energy
    definition reported previously. The new variables aim at either identifying
    dihadron cross sections in terms of single-hadron fragmentation functions, or
    to provide a means of characterizing the transverse momentum created in the
    fragmentation process. The results were obtained applying the updated
    initial-state radiation correction used in other recent Belle publications on
    light-hadron production cross sections. In addition, production cross sections
    of single charged pions, kaons, and protons were also updated using this
    initial-state radiation correction. The cross sections are obtained from a
    $558\,{\rm fb}^{-1}$ data sample collected at the $\Upsilon(4S)$ resonance with
    the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider.

    DOI: 10.1103/physrevd.101.092004

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.101.092004/fulltext

  • Update of inclusive cross sections of single and pairs of identified light charged hadrons Reviewed

    Seidl R., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   101 ( 9 )   092004   2020.05( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.101.092004

  • Evidence for a vector charmoniumlike state in e(+ )e(-) -> Ds+Ds2*(2573)(-) + c.c Reviewed

    Jia S., Shen C. P., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   101 ( 9 )   091101   2020.05( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.101.091101

  • First search for the eta(c2)(1D) in B decays at Belle Reviewed

    Chilikin K., et. al. [Belle Collaboration]

    JOURNAL OF HIGH ENERGY PHYSICS   ( 2005 )   034   2020.05( ISSN:1029-8479

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/JHEP05(2020)034

  • Measurement of R(D) and R(D*) with a Semileptonic Tagging Method Reviewed

    Caria G., Urquijo P., et. al. [Belle Collaboration]

    PHYSICAL REVIEW LETTERS   124 ( 16 )   161803   2020.04( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.124.161803

  • Observation of the Radiative Decays of Upsilon(1S) to chi(c1) Reviewed International coauthorship

    Katrenko P., et. al. [Belle Collaboration]

    PHYSICAL REVIEW LETTERS   124 ( 12 )   122001   2020.03( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.124.122001

  • Study of B -> p<(p)over bar>pi pi Reviewed International coauthorship

    Chu K., Wang M. Z., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   101 ( 5 )   052012   2020.03( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.101.052012

  • Search for B+ -> mu(+)nu(mu) and B+ -> mu N+ with inclusive tagging Reviewed International coauthorship

    Prim M. T., Bernlochner F. U., Prim F. U. M. T., Goldenzweig P., Heck M., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   101 ( 3 )   032007   2020.02( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.101.032007

  • Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment Reviewed International coauthorship

    Abudinen F., et. al. [Belle II Collaboration]

    CHINESE PHYSICS C   44 ( 2 )   021001   2020.02( ISSN:1674-1137

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1088/1674-1137/44/2/021001

  • The Belle II Physics Book (Dec, 10.1093/ptep/ptz106, 2019) Reviewed International coauthorship

    Kou E., Urquijo P., et. al.

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   2020 ( 2 )   2020.02( ISSN:2050-3911

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1093/ptep/ptaa008

  • Observation of a vector charmoniumlike state in e(+)e(-) -> D-s(+) D-s1 (2536)(-) + c.c. Reviewed International coauthorship

    Jia S., Shen C. P., Yuan C. Z., Wang X. L., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   100 ( 11 )   2019.12( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.100.111103

  • Measurements of the branching fractions B(B- -> (Lambda)over-bar(c)(-)Xi'(0)(c)), B(B- -> (Lambda)over-bar(c)(-)Xi(c )(2645)(0)) and B(B- -> (Lambda)over-bar(c)(-)Xi(c)(2790)(0)) Reviewed International coauthorship

    Li Y., Li Y. B., Shen C. P., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   100 ( 12 )   2019.12( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.100.112010

  • The Belle II Physics Book Reviewed International coauthorship

    Kou E., Urquijo P., et. al.

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 12 )   2019.12( ISSN:2050-3911

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1093/ptep/ptz106

  • Azimuthal asymmetries of back-to-back pi(+/-) - (pi(0), eta, pi(+/-)) pairs in e(+) e(-) annihilation Reviewed International coauthorship

    Li H., Vossen A., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   100 ( 9 )   2019.11( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.100.092008

  • Observation of a new structure near 10.75 GeV in the energy dependence of the e(+)e(-)-> Upsilon (nS)pi(+)pi(-) (n=1, 2, 3) cross sections Reviewed International coauthorship

    Mizuk R., Bondar A., et. al. [Belle Collaboration]

    JOURNAL OF HIGH ENERGY PHYSICS   ( 10 )   2019.10( ISSN:1029-8479

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1007/JHEP10(2019)220

  • First measurement of the CKM angle ϕ <inf>3</inf> withS B ± → D(KS0 π + π π 0) K ± decays Reviewed International coauthorship

    P. K. Resmi, J. Libby, K. Trabelsi, et. al. [Belle Collaboration]

    Journal of High Energy Physics   2019   2019.10( ISSN:11266708

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2019, The Author(s). We present the first model-independent measurement of the CKM unitarity triangle angle ϕ3 using B±→ D(KS0π+π−π0) K± decays, where D indicates either a D0 or D¯ 0 meson. Measurements of the strong-phase difference of the D →KS0π+π−π0 amplitude obtained from CLEO-c data are used as input. This analysis is based on the full Belle data set of 772 × 106BB¯ events collected at the Υ(4S) resonance. We obtain ϕ3 = (5.7−8.8+10.2±3.5±5.7)° and the suppressed amplitude ratio rB = 0.323±0.147±0.023±0.051. Here the first uncertainty is statistical, the second is the experimental systematic, and the third is due to the precision of the strong-phase parameters measured from CLEO-c data. The 95% confidence interval on ϕ3 is (−29.7, 109.5)°, which is consistent with the current world average. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP10(2019)178

  • Observation of τ- →π-ντe+e- and search for τ- →π-ντμ+μ- Reviewed International coauthorship

    Y. Jin, H. Aihara, D. Epifanov, et. al. [Belle Collaboration]

    Physical Review D   100 ( 7 )   2019.10( ISSN:24700010

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    DOI: 10.1103/PhysRevD.100.071101

  • Measurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) at Belle Reviewed International coauthorship

    Waheed E., Urquijo P., Ferlewicz D.,et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   100 ( 5 )   2019.09( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.100.052007

  • First measurements of absolute branching fractions of the Xi(+)(c) baryon at Belle Reviewed International coauthorship

    Li Y. B., Shen C. P., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   100 ( 3 )   2019.08( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.100.031101

  • Search for ω (2012) →k Ξ (1530) →kπ Ξ at Belle Reviewed International coauthorship

    S. Jia, C. P. Shen, et. al. [Belle Collaboration]

    Physical Review D   100 ( 3 )   2019.08( ISSN:24700010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . Using data samples of e+e- collisions collected at the I(1S), I(2S), and I(3S) resonances with the Belle detector, we search for the three-body decay of the ω(2012) baryon to KπΞ. This decay is predicted to dominate for models describing the ω(2012) as a KΞ(1530) molecule. No significant ω(2012) signals are observed in the studied channels, and 90% credibility level upper limits on the ratios of the branching fractions relative to KΞ decay modes are obtained.

    DOI: 10.1103/PhysRevD.100.032006

  • Evidence for B+ -> h(c)K(+) and observation of eta(c()2S) -> p(p)over-bar pi(+)pi(-) Reviewed International coauthorship

    Chilikin K., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   100 ( 1 )   2019.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.100.012001

  • Measurement of branching fraction and final-state asymmetry for the B 0 ? KS0 K p± Decay Reviewed International coauthorship

    Y. T. Lai, et. al. [Belle Collaboration]

    Physical Review D   100 ( 1 )   2019.07( ISSN:24700010

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    © 2019 authors. Published by the American Physical Society. We report a measurement of the branching fraction and final-state asymmetry for the B0?KS0K±p± decays. The analysis is based on a data sample of 711 fb-1 collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain a branching fraction of (3.60±0.33±0.15)×10-6 and a final-state asymmetry of (-8.5±8.9±0.2)%, where the first uncertainties are statistical and the second are systematic. Hints of peaking structures are found in the differential branching fractions measured as functions of Dalitz variables.

    DOI: 10.1103/PhysRevD.100.011101

  • Search for B0 →x (3872)γ Reviewed International coauthorship

    P. C. Chou, P. Chang, et. al. [Belle Collaboration]

    Physical Review D   100 ( 1 )   2019.07( ISSN:24700010

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    © 2019 authors. Published by the American Physical Society. We report the results of a search for the decay B0→X(3872)(→J/ψπ+π-)γ. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb-1 and containing 772×106BB pairs, collected with the Belle detector at the KEKB asymmetric-energy e+e- collider running at the (4S) resonance energy. We find no evidence for a signal and place an upper limit of B(B0→X(3872)γ)×B(X(3872)→J/ψπ+π-)<5.1×10-7 at 90% confidence level.

    DOI: 10.1103/PhysRevD.100.012002

  • Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e(+)e(-) annihilation at root s=10.58 GeV Reviewed International coauthorship

    Seidl R., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   99 ( 11 )   2019.06( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.99.112006

  • Search for X(3872) and X(3915) decay into chi(c1)pi(0) in B decays at Belle Reviewed International coauthorship

    Bhardwaj V, Jia S., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   99 ( 11 )   2019.06( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.99.111101

  • Evidence for the decay B-0 -> p(p)over-bar pi(0) Reviewed International coauthorship

    Pal B., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   99 ( 9 )   2019.05( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.99.091104

  • Search for the B -> Y(4260)K, Y(4260) -> J/psi pi(+)pi(-) decays Reviewed International coauthorship

    Garg R., Bhardwaj V., Singh J. B., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   99 ( 7 )   2019.04( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.99.071102

  • Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B -> X-s gamma decays Reviewed International coauthorship

    Watanuki S., Ishikawa A., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   99 ( 3 )   2019.02( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.99.032012

  • Observation of B+ -> p(Lambda)over-barK(+) K- and B+ -> (p)over-bar Lambda K+ K+ Reviewed International coauthorship

    Lu P. -C., Wang M. -Z., Chistov R., Chang P., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   99 ( 3 )   2019.02( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.99.032003

  • First measurements of absolute branching fractions of the Ξc <inf>0</inf> Baryon at Belle Reviewed International coauthorship

    Y. B. Li, C. P. Shen, C. Z. Yuan, et. al. [Belle Collaboration]

    Physical Review Letters   122 ( 8 )   2019.02( ISSN:00319007

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    © 2019 Authors. Published by the American Physical Society. We present the first measurements of absolute branching fractions of Ξc 0 decays into Ξ-π+, ΛK-π+, and pK-K-π+ final states. The measurements are made using a dataset comprising (772±11)×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e-collider. We first measure the absolute branching fraction for B-→Λ̄c-Ξc 0 using a missing-mass technique; the result is B(B-→Λ̄c-Ξc 0 )=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →Ξ-π+), B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →ΛK-π+), and B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc 0 yields the following branching fractions: B(Ξc 0 →Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc 0 →ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc 0 →pK-K-π+)=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξc 0 →Ξ-π+) can be combined with Ξc 0 branching fractions measured relative to Ξc 0 →Ξ-π+ to yield other absolute Ξc 0 branching fractions.

    DOI: 10.1103/PhysRevLett.122.082001

    PubMed

  • Measurements of branching fraction and direct CP asymmetry in B± → KS0 KS0 K± and a search for B± → KS0 KS0 π± Reviewed International coauthorship

    A. B. Kaliyar, P. Behera, G. B. Mohanty, V. Gaur, et. al. [Belle Collaboration]

    Physical Review D   99 ( 3 )   2019.02( ISSN:24700010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We study charmless hadronic decays of charged B mesons to the final states KS0KS0K± and KS0KS0π± using a 711 fb-1 data sample that contains 772×106 BB̄ pairs and was collected at the Ï (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. For B±→KS0KS0K±, the measured branching fraction and direct CP asymmetry are [10.42±0.43(stat)±0.22(syst)]×10-6 and [+1.6±3.9(stat)±0.9(syst)]%, respectively. In the absence of a statistically significant signal for B±→KS0KS0π±, we obtain a 90% confidence-level upper limit on its branching fraction as 8.7×10-7.

    DOI: 10.1103/PhysRevD.99.031102

  • Observation of Ξ (1620)0 and Evidence for Ξ (1690)0 in Ξc+ → Ξ-π+π+ Decays Reviewed International coauthorship

    M. Sumihama, et. al. [Belle Collaboration]

    Physical Review Letters   122 ( 7 )   2019.02( ISSN:00319007

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    © 2019 authors. Published by the American Physical Society. We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξ-π+ via Ξc+→Ξ-π+π+ decays based on a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The mass and width are measured to be 1610.4±6.0(stat)-4.2+6.1 (syst) MeV/c2 and 59.9±4.8(stat)-7.1+2.8(syst) MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)0 with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.

    DOI: 10.1103/PhysRevLett.122.072501

    PubMed

  • Search for CP violation with kinematic asymmetries in the D-0 -> K+K- pi(+)pi(-) decay Reviewed International coauthorship

    Kim J. B., Won E., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   99 ( 1 )   2019.01( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.99.011104

  • Observation of Transverse Λ / Λ Hyperon Polarization in e+e- Annihilation at Belle Reviewed International coauthorship

    Y. Guan, A. Vossen, et. al. [Belle Collaboration]

    Physical Review Letters   122 ( 4 )   2019.01( ISSN:00319007

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    © 2019 authors. We report the first observation of the spontaneous polarization of Λ and Λ hyperons transverse to the production plane in e+e- annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Λ/Λ production, we also report results with subtracted feed-down contributions from Σ0 and charm. This measurement uses a dataset of 800.4 fb-1 collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV. We observe a significant polarization that rises with the fractional energy carried by the Λ/Λ hyperon.

    DOI: 10.1103/PhysRevLett.122.042001

    PubMed

  • Measurement of time-dependent CP violation in B0 → KS0 π0π0 decays Reviewed International coauthorship

    Y. Yusa, et. al. [Belle Collaboation]

    Physical Review D   99 ( 1 )   2019.01( ISSN:24700010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB pairs collected by the Belle experiment running at the ?(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd "penguin" amplitude. The results are sin2φ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2φ1eff is consistent with that obtained using decay modes proceeding via a b→ccs "tree" amplitude.

    DOI: 10.1103/PhysRevD.99.011102

  • Search for a Light CP -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment Reviewed International coauthorship

    I. S. Seong, S. E. Vahsen, et. al. [Belle Collaboration]

    Physical Review Letters   122 ( 1 )   2019.01( ISSN:00319007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2019 authors. Published by the American Physical Society. We report on the first Belle search for a light CP-odd Higgs boson, A0, that decays into low mass dark matter, χ, in final states with a single photon and missing energy. We search for events produced via the dipion transition (2S)→ (1S)π+π-, followed by the on-shell process (1S)→γA0 with A0→χχ, or by the off-shell process (1S)→γχχ. Utilizing a data sample of 157.3×106 (2S) decays, we find no evidence for a signal. We set limits on the branching fractions of such processes in the mass ranges MA0<8.97 GeV/c2 and Mχ<4.44 GeV/c2. We then use the limits on the off-shell process to set competitive limits on WIMP-nucleon scattering in the WIMP mass range below 5 GeV/c2.

    DOI: 10.1103/PhysRevLett.122.011801

    PubMed

  • Measurement of the branching fraction and time-dependent CP asymmetry for B-0 -> J/psi pi(0) decays Reviewed International coauthorship

    Pal B., Schwartz A. J., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   98 ( 11 )   2018.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.98.112008

  • Measurement of the decays Lambda c -> Sigma pi pi at Belle Reviewed International coauthorship

    Berger M., Schwanda C., Suzuki K., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   98 ( 11 )   2018.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.98.112006

  • Observation of gamma(2S) -> gamma eta(b)(1S) Decay Reviewed International coauthorship

    Fulsom B. G., Pedlar T. K., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW LETTERS   121 ( 23 )   2018.12( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.121.232001

  • First Evidence for cos2β&gt;0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity Reviewed International coauthorship

    I. Adachi, et. al. [BaBar and Belle Collaborations]

    Physical Review Letters   121 ( 26 )   2018.12( ISSN:00319007

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    © 2018 authors. Published by the American Physical Society. We present first evidence that the cosine of the CP-violating weak phase 2β is positive, and hence exclude trigonometric multifold solutions of the Cabibbo-Kobayashi-Maskawa (CKM) Unitarity Triangle using a time-dependent Dalitz plot analysis of B0→D(∗)h0 with D→KS0π+π- decays, where h0 {π0,η,ω} denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BABAR and Belle experiments collected at the (4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×106BB pairs recorded by the BABAR detector and (772±11)×106BB pairs recorded by the Belle detector. The results of the measurement are sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle β of the CKM Unitarity Triangle is β=[22.5±4.4(stat)±1.2(syst)±0.6(model)]°. The measurement assumes no direct CP violation in B0→D(∗)h0 decays. The quoted model uncertainties are due to the composition of the D0→KS0π+π- decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics e+e-→cc data sample. CP violation is observed in B0→D(∗)h0 decays at the level of 5.1 standard deviations. The significance for cos2β>0 is 3.7 standard deviations. The trigonometric multifold solution π/2-β=(68.1±0.7)° is excluded at the level of 7.3 standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.

    DOI: 10.1103/PhysRevLett.121.261801

    PubMed

  • Measurement of cos2β in B0 →d (∗)h0 with D → KS0 π+π- decays by a combined time-dependent Dalitz plot analysis of BaBar and Belle data Reviewed International coauthorship

    I. Adachi, et. al. [BaBar and Belle Collaboations]

    Physical Review D   98 ( 11 )   2018.12( ISSN:24700010

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    © 2018 authors. Published by the American Physical Society. We report measurements of sin2β and cos2β using a time-dependent Dalitz plot analysis of B0→D(∗)h0 with D→KS0π+π- decays, where the light unflavored and neutral hadron h0 is a π0, η, or ω meson. The analysis uses a combination of the final data sets of the BaBar and Belle experiments containing 471×106 and 772×106 BB pairs collected at the (4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. We measure sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle is β=(22.5±4.4(stat)±1.2(syst)±0.6(model))°. The last quoted uncertainties are due to the composition of the D0→KS0π+π- decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a high-statistics e+e-→cc data sample as part of this analysis. We find the first evidence for cos2β>0 at the level of 3.7 standard deviations. The measurement excludes the trigonometric multifold solution π/2-β=(68.1±0.7)° at the level of 7.3 standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of β=0° is ruled out at the level of 5.1 standard deviations, and thus CP violation is observed in B0→D(∗)h0 decays. The measurement assumes no direct CP violation in B0→D(∗)h0 decays.

    DOI: 10.1103/PhysRevD.98.112012

  • Search for the rare decay of B+ →+νγ with improved hadronic tagging Reviewed International coauthorship

    M. Gelb, F. U. Bernlochner, P. Goldenzweig, F. Metzner, et. al. [Belle Collaboation]

    Physical Review D   98 ( 11 )   2018.12( ISSN:24700010

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    © 2018 authors. Published by the American Physical Society. We present the result of the search for the rare B meson decay of B+→+νγ with =e,μ. For the search the full data set recorded by the Belle experiment of 711 fb-1 integrated luminosity near the (4S) resonance is used. Signal candidates are reconstructed for photon energies Eγ larger than 1 GeV using a novel multivariate tagging algorithm. The novel algorithm fully reconstructs the second B meson produced in the collision using hadronic modes and was specifically trained to recognize the signal signature in combination with hadronic tag-side B meson decays. This approach greatly enhances the performance. Background processes that can mimic this signature, mainly charmless semileptonic decays and continuum processes, are suppressed using multivariate methods. The number of signal candidates is determined by analyzing the missing mass squared distribution as inferred from the signal side particles and the kinematic properties of the tag-side B meson. No significant excess over the background-only hypothesis is observed and upper limits on the partial branching fraction ΔB with Eγ>1 GeV individually for electron and muon final states as well as for the average branching fraction of both lepton final states are reported. We find a Bayesian upper limit of ΔB(B+→+νγ)<3.0×10-6 at 90% CL and also report an upper limit on the first inverse moment of the light-cone distribution amplitude of the B meson of λB>0.24 GeV at 90% CL.

    DOI: 10.1103/PhysRevD.98.112016

  • Observation of e(+) e(-) -> pi(+) pi(-) pi(0)chi(b1,2) (1P) and search for e(+) e (-) -> phi chi(b1,2) (1P) at root s=10.96-11.05 GeV Reviewed International coauthorship

    Yin J. H., Yuan C. Z., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   98 ( 9 )   2018.11( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.98.091102

  • Evidence of a structure in K¯0Λc+ consistent with a charged Ξ <inf>c</inf>(2930) + , and updated measurement of B¯0K¯0Λc+Λ¯c- at Belle: Belle Collaboration Reviewed International coauthorship

    Y. B. Li, C. P. Shen, et. al. [Belle Collaboation]

    European Physical Journal C   78 ( 11 )   2018.11( ISSN:14346044

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    © 2018, The Author(s). We report evidence for the charged charmed-strange baryon Ξ c(2930) + with a signal significance of 3.9σ with systematic errors included. The charged Ξ c(2930) + is found in its decay to KS0Λc+ in the substructure of B¯0→KS0Λc+Λ¯c- decays. The measured mass and width are [2942.3 ± 4.4 (stat.) ± 1.5 (syst.)] MeV/c2 and [14.8 ± 8.8 (stat.) ± 2.5 (syst.)] MeV, respectively, and the product branching fraction is B(B¯0→Ξc(2930)+Λ¯c-)B(Ξc(2930)+→K¯0Λc+)=[2.37±0.51(stat.)±0.31(syst.)]×10-4. We also measure B(B¯0→K¯0Λc+Λ¯c-)=[3.99±0.76(stat.)±0.51(syst.)]×10-4 with greater precision than previous experiments, and present the results of a search for the charmonium-like state Y(4660) and its spin partner, Yη, in the Λc+Λ¯c- invariant mass spectrum. No clear signals of the Y(4660) or Yη are observed and the 90% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of (772 ± 11) × 10 6BB¯ pairs collected at the Υ (4 S) resonance by the Belle detector at the KEKB asymmetric energy electron-positron collider.

    DOI: 10.1140/epjc/s10052-018-6425-5

  • Observation of e + e - → γχ <inf>c1</inf> and search for e + e - → γχ <inf>c0</inf> , γχ <inf>c2</inf> , and γη <inf>c</inf> at √s near 10.6 GeV at Belle Reviewed International coauthorship

    S. Jia, X. L. Wang, C. P. Shen, C. Z. Yuan, et. al. [Belle Collaboation]

    Physical Review D   98 ( 9 )   2018.11( ISSN:24700010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018 authors. Published by the American Physical Society. Using data samples of 89.5 fb-1, 711.0 fb-1, and 121.4 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions e+e-→γχcJ (J=0, 1, 2) and e+e-→γηc. A significant γχc1 signal is observed for the first time at s=10.58 GeV with a significance of 5.1σ including systematic uncertainties. No significant excesses for γχc0, γχc2, and γηc final states are found, and we set 90% credibility level upper limits on the Born cross sections (σB) at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of σB(e+e-→γχc1) is obtained.

    DOI: 10.1103/PhysRevD.98.092015

  • Measurement of eta(c) (1S), eta(c)(2S), and nonresonant eta 'pi(+)pi(-) production via two-photon collisions Reviewed International coauthorship

    Xu Q. N., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   98 ( 7 )   2018.10( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.98.072001

  • Search for the lepton-flavor-violating decay B 0 → K *0 μ ± e Reviewed International coauthorship

    S. Sandilya, K. Trabelsi, A. J. Schwartz, et. al. [Belle Collaboation]

    Physical Review D   98 ( 7 )   2018.10( ISSN:24700010

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    © 2018 authors. Published by the American Physical Society. We have searched for the lepton-flavor-violating decay B0→K∗0μ±e using a data sample of 711 fb-1 that contains 772×106 BB̄ pairs. The data were collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. No signals were observed, and we set 90% confidence level upper limits on the branching fractions of B(B0→K∗0μ+e-)<1.2×10-7, B(B0→K∗0μ-e+)<1.6×10-7, and, for both decays combined, B(B0→K∗0μ±e)<1.8×10-7. These are the most stringent limits on these decays to date.

    DOI: 10.1103/PhysRevD.98.071101

  • Observation of Upsilon(4S) -> eta 'Upsilon(1S) Reviewed International coauthorship

    Guido E., Mussa R., Tamponi U., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW LETTERS   121 ( 6 )   2018.08( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.121.062001

  • Inclusive study of bottomonium production in association with an η meson in e+e- annihilations near Υ(5 S) : Belle Collaboration Reviewed International coauthorship

    U. Tamponi, E. Guido, R. Mussa, et. al. [Belle Collaboation]

    European Physical Journal C   78 ( 8 )   2018.08( ISSN:14346044

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018, The Author(s). We study bottomonium production in association with an η meson in e+e- annihilations near the Υ(5 S) , at a centre-of-mass energy of s=10.866 GeV. The results are based on the 121.4 fb- 1 data sample collected by the Belle experiment at the asymmetric-energy KEKB collider. Only the η meson is reconstructed and the missing-mass spectrum of η candidates is investigated. We observe the e+e-→ ηΥJ(1 D) process and find evidence for the e+e-→ ηΥ(2 S) process, while no significant signals of Υ(1 S) , hb(1 P) , nor hb(2 P) are found. Cross sections for the studied processes are reported.

    DOI: 10.1140/epjc/s10052-018-6086-4

  • Observation of an Excited Ω- Baryon Reviewed International coauthorship

    J. Yelton, et. al. [Belle Collaboation]

    Physical Review Letters   121 ( 5 )   2018.08( ISSN:00319007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018 authors. Published by the American Physical Society. Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω∗- candidate decaying into Ξ0K- and Ξ-KS0 with a mass of 2012.4±0.7(stat)±0.6(syst) MeV/c2 and a width of Γ=6.4-2.0+2.5(stat)±1.6(syst) MeV. The Ω∗- is seen primarily in (1S), (2S), and (3S) decays.

    DOI: 10.1103/PhysRevLett.121.052003

  • Measurement of the branching fraction of B -> D-(*()) pi l nu at Belle using hadronic tagging in fully reconstructed events Reviewed International coauthorship

    Vossen A., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   98 ( 1 )   2018.07( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.98.012005

  • Search for B- →μ- ν μ Decays at the Belle Experiment Reviewed International coauthorship

    A. Sibidanov, K. E. Varvell, et. al. [Belle Collaboation]

    Physical Review Letters   121 ( 3 )   2018.07( ISSN:00319007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018 authors. Published by the American Physical Society. We report the results of a search for the rare, purely leptonic decay B-→μ-ν μ performed with a 711 fb-1 data sample that contains 772×106 BB pairs, collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The signal events are selected based on the presence of a high momentum muon and the topology of the rest of the event showing properties of a generic B-meson decay, as well as the missing energy and momentum being consistent with the hypothesis of a neutrino from the signal decay. We find a 2.4 standard deviation excess above background including systematic uncertainties, which corresponds to a branching fraction of B(B-→μ-νμ)=(6.46±2.22±1.60)×10-7 or a frequentist 90% confidence level interval on the B-→μ-ν μ branching fraction of [2.9,10.7]×10-7.

    DOI: 10.1103/PhysRevLett.121.031801

  • Search for ϒ(1S,2S)→Zc+Zc(′)− and e+e−→Zc+Zc(′)− at s=10.52 , 10.58, and 10.867 GeV Reviewed International coauthorship

    S. Jia, C. P. Shen, C. Z. Yuan, et. al. [Belle Collaboation]

    Physical Review D   97   2018.06( ISSN:24700010

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    © 2018 American Physical Society. The first search for double charged charmoniumlike state production in Ï?(1S) and Ï?(2S) decays and in e+e- annihilation at s=10.52, 10.58, and 10.867 GeV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes, and the 90% credibility level upper limits on their product branching fractions in Ï?(1S) and Ï?(2S) decays [B(Ï?(1S,2S)→Zc+Zc(′)-)×B(Zc+→π++cc) (cc=J/ψ, χc1(1P), ψ(2S))] and the product of Born cross section and branching fraction for e+e-→Zc+Zc(′)- (σ(e+e-→Zc+Zc(′)-)×B(Zc+→π++cc)) at s=10.52, 10.58, and 10.867 GeV are determined. Here, Zc refers to the Zc(3900) and Zc(4200) observed in the πJ/ψ final state, the Zc1(4050) and Zc2(4250) in the πχc1(1P) final state, and the Zc(4050) and Zc(4430) in the πψ(2S) final state.

    DOI: 10.1103/PhysRevD.97.112004

  • Measurement of time-dependent CP asymmetries in B-0 -> K-S(0)eta gamma decays Reviewed International coauthorship

    Nakano H., Ishikawa A., Sumisawa K., Yamamoto H., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   97 ( 9 )   2018.05( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.97.092003

  • Study of KS0 pair production in single-tag two-photon collisions Reviewed International coauthorship

    M. Masuda, S. Uehara, Y. Watanabe, et. al. [Belle Collaboation]

    Physical Review D   97 ( 5 )   2018.03( ISSN:24700010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018 authors. We report a measurement of the cross section for KS0 pair production in single-tag two-photon collisions, γ∗γ→KS0KS0, for Q2 up to 30 GeV2, where Q2 is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic range 1.0 GeV<W<2.6 GeV and |cosθ∗|<1.0 for the total energy and kaon scattering angle, respectively, in the γ∗γ center-of-mass system. These results are based on a data sample of 759 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. For the first time, the transition form factor of the f2′(1525) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. We have derived the cross section for the process for W<2.6 GeV from 121 signal candidate events. Finally, the γ∗γ partial decay widths of the χc0 and χc2 mesons are measured as a function of Q2 based on 10 candidate events in total.

    DOI: 10.1103/PhysRevD.97.052003

  • RaspberryPi を用いた測定器データ収集システムの構築 -安価に手軽にDAQ構築- Reviewed

    岩崎 昌子, 南條 創, 帯名 崇, 上窪田 紀彦, 山本 昇

    高エネルギーニュース   36 ( 4 )   189 - 196   2018.03

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:Domestic journal  

  • Observation of Ξ <inf>c</inf>(2930) 0 and updated measurement of B-K-Λc+Λ¯c- at Belle: Belle Collaboration Reviewed International coauthorship

    Y. B. Li, C. P. Shen, et. al. [Belle Collaboation]

    European Physical Journal C   78 ( 3 )   2018.03( ISSN:14346044

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018, The Author(s). We report the first observation of the Ξ c(2930) 0 charmed-strange baryon with a significance greater than 5σ. The Ξ c(2930) 0 is found in its decay to K-Λc+ in B-→K-Λc+Λ¯c- decays. The measured mass and width are [2928.9±3.0(stat.)-12.0+0.9(syst.)] MeV/c2 and [19.5±8.4(stat.)-7.9+5.9(syst.)] MeV, respectively, and the product branching fraction is B(B-→Ξc(2930)0Λ¯c-)B(Ξc(2930)0→K-Λc+)=[1.73±0.45(stat.)±0.21(syst.)]×10-4. We also measure B(B-→K-Λc+Λ¯c-)=[4.80±0.43(stat.)±0.60(syst.)]×10-4 with improved precision, and search for the charmonium-like state Y(4660) and its spin partner, Yη, in the Λc+Λ¯c- invariant mass spectrum. No clear signals of the Y(4660) nor its spin partner are observed and the 90% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of (772 ± 11) × 10 6BB¯ pairs collected at the Υ (4 S) resonance by the Belle detector at the KEKB asymmetric energy electron–positron collider.

    DOI: 10.1140/epjc/s10052-018-5720-5

  • Observation of excited Ωc charmed baryons in e+e- collisions Reviewed International coauthorship

    J. Yelton, et. al. [Belle Collaboation]

    Physical Review D   97 ( 5 )   2018.03( ISSN:24700010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018 authors. Using the entire Belle data sample of 980 fb-1 of e+e- collisions, we present the results of a study of excited Ωc charmed baryons in the decay mode Ξc+K-. We show confirmation of four of the five narrow states reported by the LHCb Collaboration: the Ωc(3000), Ωc(3050), Ωc(3066), and Ωc(3090).

    DOI: 10.1103/PhysRevD.97.051102

  • Measurement of the tau Michel parameters (eta)over-bar and xi kappa in the radiative leptonic decay tau(-) -> l(-)nu(tau)(nu)over-bar(l)gamma Reviewed International coauthorship

    Shimizu N., Aihara H., Epifanov D., ..., Iwasaki M., 他 Belle Collaboration

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 2 )   2018.02( ISSN:2050-3911

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1093/ptep/pty003

  • Measurement of branching fractions of hadronic decays of the Ω c 0 baryon Reviewed International coauthorship

    J. Yelton, et. al. [Belle Collaboation]

    Physical Review D   97 ( 3 )   2018.02( ISSN:24700010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    © 2018 authors. Using a data sample of 980 fb-1 of e+e- annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report the results of a study of the decays of the Ωc0 charmed baryon into hadronic final states. We report the most precise measurements to date of the relative branching fractions of the Ωc0 into Ω-π+π0, Ω-π+π-π+, Ξ-K-π+π+, and Ξ0K-π+, as well as the first measurements of the branching fractions of the Ωc0 into Ξ-K̄0π+, Ξ0K̄0, and ΛK̄0K̄0, all with respect to the Ω-π+ decay. In addition, we investigate the resonant substructure of these modes. Finally, we present a limit on the branching fraction for the decay Ωc0→Σ+K-K-π+.

    DOI: 10.1103/PhysRevD.97.032001

  • Search for CP violation in the D+ -> pi(+) pi(0) decay at Belle Reviewed International coauthorship

    Babu V., Trabelsi K., Mohanty G. B., Aziz T., Greenwald D., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   97 ( 1 )   2018.01( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.97.011101

  • Measurement of the tau lepton polarization and R(D*) in the decay (B)over-bar -> D*tau(-)(nu)over-bar(tau) with one-prong hadronic tau decays at Belle Reviewed International coauthorship

    Hirose S., Iijima T., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   97 ( 1 )   2018.01( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.97.012004

  • Angular analysis of the e (+)e (-) -> D-(*D-)+/-*(-/+) process near the open charm threshold using initial- state radiation Reviewed International coauthorship

    Zhukova V., Pakhlova G., Pakhlov P., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   97 ( 1 )   2018.01( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.97.012002

  • Measurements of the absolute branching fractions of B + → X <inf>cc̄</inf> K + and B + → D̄ (*)0 π + at Belle Reviewed International coauthorship

    Y. Kato, T. Iijima, et. al. [Belle Collaboation]

    Physical Review D   97 ( 1 )   2018.01( ISSN:24700010

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    © 2018 authors. Published by the American Physical Society. We present the measurement of the absolute branching fractions of B+→Xcc̄K+ and B+→D̄(∗)0π+ decays, using a data sample of 772×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Here, Xcc̄ denotes ηc, J/ψ, χc0, χc1, ηc(2S), ψ(2S), ψ(3770), X(3872), and X(3915). We do not observe significant signals for X(3872) or X(3915) and set the 90% confidence level upper limits at B(B+→X(3872)K+)<2.6×10-4 and B(B+→X(3915)K+)<2.8×10-4. These represent the most stringent upper limit for B(B+→X(3872)K+) to date and the first limit for B(B+→X(3915)K+). The measured branching fractions for ηc and ηc(2S) are the most precise to date, B(B+→ηcK+)=(12.0±0.8±0.7)×10-4 and B(B+→ηc(2S)K+)=(4.8±1.1±0.3)×10-4, where the first and second uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevD.97.012005

  • Measurement of the D∗− polarization in the decay B0 → D∗−τ+ν<inf>τ</inf> International coauthorship

    A. Abdesselam, et. al. [Belle Collaboation]

    10th International Workshop on the CKM Unitarity Triangle, CKM 2018   2018.01

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    © 2018 Heidelberg University. All rights reserved. We report the first measurement of the D∗− meson polarization in the decay B0 → D∗−τ+ντ using the full data sample of 772×106 BB¯ pairs recorded with the Belle detector at the KEKB electron-positron collider. Our result, FLD∗ = 0.60 ±0.08(stat) ±0.04(sys), where FLD∗ denotes the D∗− meson longitudinal polarization fraction, agrees within about 1.7 standard deviations of the standard model prediction.

  • Search for light tetraquark states in ϒ(1S) and ϒ(2S) decays Reviewed International coauthorship

    S. Jia, C. P. Shen, C. Z. Yuan, et. al. [Belle Collaboation]

    Physical Review D   96 ( 11 )   2017.12( ISSN:24700010

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    © 2017 American Physical Society. We search for the JPC = 0−− and 1þ− light tetraquark states with masses up to 2.46 GeV=c2 in ϒð1SÞ and ϒð2SÞ decays with data samples of ð102 2Þ million and ð158 4Þ million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, and 90% credibility level (C.L.) upper limits on their branching fractions in ϒð1SÞ and ϒð2SÞ decays are obtained. The inclusive branching fractions of the ϒð1SÞ and ϒð2SÞ decays into final states with f1ð1285Þ are measured to be Bðϒð1SÞ → f1ð1285Þ þ anythingÞ ¼ ð46 28ðstatÞ 13ðsystÞÞ × 10−4 and Bðϒð2SÞ → f1ð1285Þ þ anythingÞ ¼ ð22 15ðstatÞ 6.3ðsystÞÞ × 10−4. The measured χb2 → J=ψ þ anything branching fraction is measured to be ð1.50 0.34ðstatÞ 0.22ðsystÞÞ × 10−3, and 90% C.L. upper limits for the χb0;b1 → J=ψ þ anything branching fractions are found to be 2.3 × 10−3 and 1.1 × 10−3, respectively. For Bðχb1 → ω þ anythingÞ, the branching fraction is measured to be ð4.9 1.3ðstatÞ 0.6ðsystÞÞ × 10−2. All results reported here are the first measurements for these modes.

    DOI: 10.1103/PhysRevD.96.112002

  • Magnetic measurement for superconducting-quadrupole magnets of final-focus system for SuperKEKB Reviewed

    Y. Arimoto, X. Wang, Z. Zong, K. Tsuchiya, M. Iwasaki, H. Yamaoka, N. Ohuchi

    IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference   3771 - 3773   2016

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    SuperKEKB is an upgrade project of KEKB to increase its luminosity to 8 × 1035 cm-2 s-1 based on the nano-beam scheme. In SuperKEKB, one of a key element is a final-focus system; it reduces e-/e+ beam size to 50 nm in vertical and 10 μm in horizontal direction at an interaction point (IP). The system consists of eight superconducting quadrupole magnets and four quadrupoles are aligned on the each beam line. The quadrupole, QC1P(QC1E), which is located at the closest position to the IP on the e+(e-) beam line, generates a field gradient of about 70 T/m. An inner diameter of coil and a magnetic length for QC1P(QC1E) are 25(33) mm and 334(373) mm, respectively. The production of all quadrupole magnets are completed. To confirm their field qualities, we performed magnetic measurement for each magnet in advance to be integrated into cryostats on the beam lines. In the measurement, the quadrupoles were cooled down to 4.2 K in a test vertical cryostat and magnetic field were measured with harmonic coils. The amplitudes of higher order harmonics for all magnets met requirements from beam optics design. In this paper we describe the measurement results.

  • First Observation of CP Violation in (B)over-bar(0) -&gt; D(CP)((*))h(0) Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data Reviewed

    A. Abdesselam, I. Adachi, A. Adametz, T. Adye, H. Ahmed, H. Aihara, S. Akar, M. S. Alam, J. Albert, S. Al Said, R. Andreassen, C. Angelini, F. Anulli, K. Arinstein, N. Arnaud, D. M. Asner, D. Aston, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, H. R. Band, Sw. Banerjee, E. Barberio, D. J. Bard, R. J. Barlow, G. Batignani, A. Beaulieu, M. Bellis, E. Ben-Haim, D. Bernard, F. U. Bernlochner, S. Bettarini, D. Bettoni, A. J. Bevan, V. Bhardwaj, B. Bhuyan, F. Bianchi, M. Biasini, J. Biswal, V. E. Blinov, P. C. Bloom, A. Bobrov, M. Bomben, A. Bondar, G. R. Bonneaud, G. Bonvicini, A. Bozek, C. Bozzi, M. Bracko, H. Briand, T. E. Browder, D. N. Brown, D. N. Brown, C. Buenger, P. R. Burchat, A. R. Buzykaev, R. Calabrese, A. Calcaterra, G. Calderini, M. Carpinelli, C. Cartaro, G. Casarosa, R. Cenci, D. Cervenkov, P. Chang, D. S. Chao, J. Chauveau, R. Cheaib, V. Chekelian, A. Chen, C. Chen, C. H. Cheng, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, H. H. F. Choi, S-K. Choi, M. Chrzaszcz, G. Cibinetto, D. Cinabro, J. Cochran, J. P. Coleman, R. Contri, M. R. Convery, G. Cowan, R. Cowan, L. Cremaldi, J. Dalseno, S. Dasu, M. Davier, C. L. Davis, F. De Mori, G. De Nardo, A. G. Denig, D. Derkach, R. de Sangro, B. Dey, F. Di Lodovico, J. Dingfelder, S. Dittrich, Z. Dolezal, J. Dorfan, Z. Drasal, A. Drutskoy, V. P. Druzhinin, G. P. Dubois-Felsmann, W. Dunwoodie, D. Dutta, M. Ebert, B. Echenard, S. Eidelman, G. Eigen, A. M. Eisner, S. Emery, J. A. Ernst, R. Faccini, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, F. Ferrarotto, F. Ferroni, R. C. Field, A. Filippi, G. Finocchiaro, E. Fioravanti, K. T. Flood, W. T. Ford, F. Forti, M. Franco Sevilla, M. Fritsch, J. R. Fry, B. G. Fulsom, E. Gabathuler, N. Gabyshev, D. Gamba, A. Garmash, J. W. Gary, I. Garzia, M. Gaspero, V. Gaur, A. Gaz, T. J. Gershon, D. Getzkow, R. Gillard, L. Li Gioi, M. A. Giorgi, R. Glattauer, R. Godang, Y. M. Goh, P. Goldenzweig, B. Golob, V. B. Golubev, R. Gorodeisky, W. Gradl, M. T. Graham, E. Grauges, K. Griessinger, A. V. Gritsan, G. Grosdidier, O. Gruenberg, N. Guttman, J. Haba, A. Hafner, B. Hamilton, T. Hara, P. F. Harrison, C. Hast, K. Hayasaka, H. Hayashii, C. Hearty, X. H. He, M. Hess, D. G. Hitlin, T. M. Hong, K. Honscheid, W-S. Hou, Y. B. Hsiung, Z. Huard, D. E. Hutchcroft, T. Iijima, G. Inguglia, W. R. Innes, A. Ishikawa, R. Itoh, Y. Iwasaki, J. M. Izen, I. Jaegle, A. Jawahery, C. P. Jessop, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, R. Kass, T. Kawasaki, L. T. Kerth, A. Khan, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, P. Kim, S. H. Kim, Y. J. Kim, G. J. King, K. Kinoshita, B. R. Ko, H. Koch, P. Kodys, Yu. G. Kolomensky, S. Korpar, D. Kovalskyi, R. Kowalewski, E. A. Kravchenko, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, A. Kuzmin, Y. -J. Kwon, H. M. Lacker, G. D. Lafferty, L. Lanceri, D. J. Lange, A. J. Lankford, T. E. Latham, T. Leddig, F. Le Diberder, D. H. Lee, I. S. Lee, M. J. Lee, J. P. Lees, D. W. G. S. Leith, Ph. Leruste, M. J. Lewczuk, P. Lewis, J. Libby, W. S. Lockman, O. Long, D. Lopes Pegna, J. M. LoSecco, X. C. Lou, T. Lueck, S. Luitz, P. Lukin, E. Luppi, A. Lusiani, V. Luth, A. M. Lutz, G. Lynch, D. B. MacFarlane, B. Malaescu, U. Mallik, E. Manoni, G. Marchiori, M. Margoni, S. Martellotti, F. Martinez-Vidal, M. Masuda, T. S. Mattison, D. Matvienko, J. A. McKenna, B. T. Meadows, K. Miyabayashi, T. S. Miyashita, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, M. R. Monge, H. K. Moon, M. Morandin, D. R. Muller, R. Mussa, E. Nakano, H. Nakazawa, M. Nakao, T. Nanut, M. Nayak, H. Neal, N. Neri, N. K. Nisar, S. Nishida, I. M. Nugent, B. Oberhof, J. Ocariz, S. Ogawa, S. Okuno, E. O. Olaiya, J. Olsen, P. Ongmongkolkul, G. Onorato, A. P. Onuchin, Y. Onuki, W. Ostrowicz, A. Oyanguren, G. Pakhlova, P. Pakhlov, A. Palano, B. Pal, F. Palombo, Y. Pan, W. Panduro Vazquez, E. Paoloni, C. W. Park, H. Park, S. Passaggio, P. M. Patel, C. Patrignani, P. Patteri, D. J. Payne, T. K. Pedlar, D. R. Peimer, I. M. Peruzzi, L. Pesantez, R. Pestotnik, M. Petric, M. Piccolo, L. Piemontese, L. E. Piilonen, A. Pilloni, G. Piredda, S. Playfer, V. Poireau, F. C. Porter, M. Posocco, V. Prasad, S. Prell, R. Prepost, E. M. T. Puccio, T. Pulliam, M. V. Purohit, B. G. Pushpawela, M. Rama, A. Randle-Conde, B. N. Ratcliff, G. Raven, E. Ribezl, J. D. Richman, J. L. Ritchie, G. Rizzo, D. A. Roberts, S. H. Robertson, M. Roehrken, J. M. Roney, A. Roodman, A. Rossi, A. Rostomyan, M. Rotondo, P. Roudeau, R. Sacco, Y. Sakai, S. Sandilya, L. Santelj, V. Santoro, T. Sanuki, Y. Sato, V. Savinov, R. H. Schindler, O. Schneider, G. Schnell, T. Schroeder, K. R. Schubert, B. A. Schumm, C. Schwanda, A. J. Schwartz, R. F. Schwitters, C. Sciacca, A. Seiden, S. J. Sekula, K. Senyo, O. Seon, S. I. Serednyakov, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T-A. Shibata, J-G. Shiu, M. Simard, G. Simi, F. Simon, F. Simonetto, Yu. I. Skovpen, A. J. S. Smith, J. G. Smith, A. Snyder, R. Y. So, R. J. Sobie, A. Soffer, Y. -S. Sohn, M. D. Sokoloff, A. Sokolov, E. P. Solodov, E. Solovieva, B. Spaan, S. M. Spanier, M. Staric, A. Stocchi, R. Stroili, B. Stugu, D. Su, M. K. Sullivan, M. Sumihama, K. Sumisawa, T. Sumiyoshi, D. J. Summers, L. Sun, U. Tamponi, P. Taras, N. Tasneem, Y. Teramoto, V. Tisserand, K. Yu. Todyshev, W. H. Toki, C. Touramanis, K. Trabelsi, T. Tsuboyama, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, U. Uwer, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, G. Vasseur, J. Va'vra, M. Verderi, A. Vinokurova, L. Vitale, V. Vorobyev, C. Voss, M. N. Wagner, S. R. Wagner, R. Waldi, J. J. Walsh, C. H. Wang, M-Z. Wang, P. Wang, Y. Watanabe, C. A. West, K. M. Williams, F. F. Wilson, J. R. Wilson, W. J. Wisniewski, E. Won, G. Wormser, D. M. Wright, S. L. Wu, H. W. Wulsin, H. Yamamoto, J. Yamaoka, S. Yashchenko, C. Z. Yuan, Y. Yusa, A. Zallo, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    AMER PHYSICAL SOC PHYSICAL REVIEW LETTERS   115 ( 12 )   2015.09( ISSN:0031-9007

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    We report a measurement of the time-dependent CP asymmetry of (B) over bar (0) -&gt; D(CP)((*))h(0) decays, where the light neutral hadron h(0) is a pi(0), eta , or omega meson, and the neutral D meson is reconstructed in the CP eigenstates K+K-, K-S(0)pi(0) or K-S(0)omega. The measurement is performed combining the final data samples collected at the Upsilon(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471 +/- 3) x 10(6) B (B) over bar pairs recorded by the BABAR detector and (772 +/- 11) x 10(6) B (B) over bar pairs recorded by the Belle detector. We measure the CP asymmetry parameters -eta S-f = +0.66 +/- 0.10(stat) +/- 0.06(syst) and C = -0.02 +/- 0.07(stat) +/- 0.03(syst). These results correspond to the first observation of CP violation in (B) over bar (0) -&gt; D(CP)((*))h(0) decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.

    DOI: 10.1103/PhysRevLett.115.121604

  • Design and Construction of the SuperKEKB QC1 Final Focus Superconducting Magnets Reviewed

    Ohuchi Norihito, Arimoto Yasushi, Higashi Norio, Iwasaki Masako, Kawai Masanori, Kondou Yoshinari, Kono Hiroshi, Murai Takashi, Takagi Shigeyuki, Tsuchiya Kiyosumi, Yamaoka Hiroshi, Zong Zhanguo

    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   25 ( 3 )   2015.06( ISSN:1051-8223

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    DOI: 10.1109/TASC.2014.2364858

  • The Construction Status of the SuperKEKB Control System Reviewed

    Masako Iwasaki et al.

    ICALEPCS2015: Proceedings of the 15th International Conference on Accelerator & Large Experimental Physics Control Systems   2015

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    Publishing type:Research paper (international conference proceedings)   Kind of work:Joint Work  

  • The Physics of the B Factories Reviewed

    A. J. Bevan, et. al. [BaBar and Belle Collaboations]

    European Physical Journal C   74 ( 11 )   1 - 928   2014.11( ISSN:14346044

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    DOI: 10.1140/epjc/s10052-014-3026-9

  • SuperKEKB加速器トンネル内無線LANシステムの導入 Reviewed

    岩崎 昌子, 佐藤 政則

    日本加速器学会誌   11 ( 1 )   4 - 10   2014.04( ISSN:1349-3833

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  • Design and Status of the SuperKEKB Accelerator Control System Invited Reviewed

    Masako Iwasaki et al.

    ICALEPCS2013: Proceedings of the 14th International Conference on Accelerator & Large Experimental Physics Control Systems   4 - 7   2014.03

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  • Design and Status of the SuperKEKB Accelerator Control Network System Reviewed

    Masako Iwasaki

    ICALEPCS2013: Proceedings of the 14th International Conference on Accelerator & Large Experimental Physics Control Systems   1107 - 1110   2014.03

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  • Design and status of the superKEKB accelerator control network system Reviewed

    M. Iwasaki, K. Furukawa, T. T. Nakamura, T. Obina, S. Sasaki, M. Satoh, T. Aoyama, T. Nakamura

    IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference   3150 - 3152   2014.01

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    Copyright © 2014 CC-BY-3.0 and by the respective authors. We have upgraded the accelerator control network system for SuperKEKB, the next generation B-factory experiment in Japan. The new network system has the higher performance based on the wider bandwidth data transfer, and more reliable and redundant network configuration. For the SuperKEKB construction, the new wireless network system has installed into the whole 3 km circumference accelerator tunnel.

  • Measurement of the branching fraction of B+ → τ+ν<inf>τ</inf> decays with the semileptonic tagging method and the full Belle data sample International coauthorship

    A. Abdesselam, et. al. [Belle Collaboation]

    8th International Workshop on the CKM Unitarity Triangle, CKM 2014   2014.01

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    © 2014 Technische Universitaet Wien. All rights reserved. We report a measurement of the branching fraction of B+ → τ+ντ decays using a data sample of 772 × 106BB pairs, collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We reconstruct the accompanying B meson in a semileptonic decay and detect the B+ → τ+ντ candidate in the recoiling event. We obtain a branching fraction of B(B+ → τ+ντ) = [1.25 ± 0.28(stat.) ± 0.27(syst.)] × 10−4. This result is in good agreement with previous measurements and the expectation from calculations based on the Standard Model.

  • Commissioning of KEKB Reviewed

    Abe Tetsuo, Akai Kazunori, Cai Yunhai, Ebihara Kiyokazu, Egawa Kazumi, Enomoto Atsushi, Flanagan John, Fukuma Hitoshi, Funakoshi Yoshihiro, Furukawa Kazuro, Furuya Takaaki, Haba Junji, Hiramatsu Shigenori, Hosoyama Kenji, Ieiri Takao, Iida Naoko, Ikeda Hitomi, Iwasaki Masako, Kageyama Tatsuya, Kamada Susumu, Kamitani Takuya, Kato Shigeki, Kikuchi Mitsuo, Kikutani Eiji, Koiso Haruyo, Kurokawa Shin-ichi, Masuzawa Mika, Matsumoto Toshihiro, Mimashi Toshihiro, Miura Takako, Morita Akio, Morita Yoshiyuki, Nakamura Tatsuro T., Nakanishi Kota, Nishiwaki Michiru, Ogawa Yujiro, Ohmi Kazuhito, Ohnishi Yukiyoshi, Ohsawa Satoshi, Ohuchi Norihito, Oide Katsunobu, Oki Toshiyuki, Ono Masaaki, Perevedentsev Eugene, Satoh Kotaro, Satoh Masanori, Seimiya Yuji, Shibata Kyo, Shimada Miho, Suetake Masaaki, Suetsugu Yusuke, Sugimura Takashi, Suwada Tsuyoshi, Tajima Osamu, Tawada Masafumi, Tejima Masaki, Tobiyama Makoto, Tokuda Noboru, Uehara Sadaharu, Uno Shoji, Yamamoto Yasuchika, Yano Yoshiharu, Yokoyama Kazue, Yoshida Masato, Yoshida Mitsuhiro, Yoshimoto Shin-ichi, Yoshioka Masakazu, Zhou Demin, Zong Zhanguo

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 3 )   2013.03( ISSN:2050-3911

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    DOI: 10.1093/ptep/pts101

  • Accelerator design at SuperKEKB Reviewed

    Ohnishi Yukiyoshi, Abe Tetsuo, Adachi Toshikazu, Akai Kazunori, Arimoto Yasushi, Ebihara Kiyokazu, Egawa Kazumi, Flanagan John, Fukuma Hitoshi, Funakoshi Yoshihiro, Furukawa Kazuro, Furuya Takaaki, Iida Naoko, Iinuma Hiromi, Ikeda Hoitomi, Ishibashi Takuya, Iwasaki Masako, Kageyama Tatsuya, Kamada Susumu, Kamitani Takuya, Kanazawa Ken-ichi, Kikuchi Mitsuo, Koiso Haruyo, Masuzawa Mika, Mimashi Toshihiro, Miura Takako, Mori Takashi, Morita Akio, Nakamura Tatsuro, Nakanishi Kota, Nakayama Hiroyuki, Nishiwaki Michiru, Ogawa Yujiro, Ohmi Kazuhito, Ohuchi Norihito, Oide Katsunobu, Oki Toshiyuki, Ono Masaaki, Satoh Masanori, Shibata Kyo, Suetake Masaaki, Suetsugu Yusuke, Sugahara Ryuhei, Sugimoto Hiroshi, Suwada Tsuyoshi, Tawada Masafumi, Tobiyama Makoto, Tokuda Noboru, Tsuchiya Kiyosumi, Yamaoka Hiroshi, Yano Yoshiharu, Yoshida Mitsuhiro, Yoshimoto Shin-ichi, Zhou Demin, Zong Zhanguo

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 3 )   2013.03( ISSN:2050-3911

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    DOI: 10.1093/ptep/pts083

  • Precise measurement of the branching fractions for B-s(0) -> D-s(()*()+) D-s(()*()-) and first measurement of the D-s*(+) D-s*(-) polarization using e(+)e(-) collisions Reviewed

    Esen, S. Schwartz, A. J. Aihara, H. Asner, D. M. Aushev, T. Bakich, A. M. Belous, K. Bhuyan, B. Bozek, A. Bracko, M. Browder, T. E. Chekelian, V. Chen, A. Chen, P. Cheon, B. G. Chilikin, K. Chistov, R. Cho, I. -S. Cho, K. Choi, Y. Dalseno, J. Danilov, M. Dolezal, Z. Drutskoy, A. Eidelman, S. Feindt, M. Gaur, V. Haba, J. Hara, T. Hayashii, H. Horii, Y. Hoshi, Y. Hou, W. -S. Hsiung, Y. B. Hyun, H. J. Iijima, T. Ishikawa, A. Itoh, R. Iwabuchi, M. Iwasaki, Y. Iwashita, T. Julius, T. Kang, J. H. Kawasaki, T. Kiesling, C. Kim, H. O. Kim, K. T. Kim, M. J. Kim, Y. J. Kinoshita, K. Ko, B. R. Koblitz, S. Kodys, P. Korpar, S. Kouzes, R. T. Krizan, P. Krokovny, P. Kuhr, T. Kumita, T. Kwon, Y. -J. Lee, S. -H. Li, J. Li, Y. Libby, J. Liu, C. Liu, Y. Liventsev, D. Louvot, R. McOnie, S. Miyata, H. Mizuk, R. Mohapatra, D. Moll, A. Muramatsu, N. Nakao, M. Nakazawa, H. Natkaniec, Z. Ng, C. Nishida, S. Nishimura, K. Nitoh, O. Ohshima, T. Okuno, S. Olsen, S. L. Onuki, Y. Pakhlova, G. Park, C. W. Park, H. Park, H. K. Pedlar, T. K. Pestotnik, R. Petric, M. Piilonen, L. E. Roehrken, M. Ryu, S. Sakai, Y. Santel, D. Santelj, L. Sanuki, T. Sato, Y. Schneider, O. Schwanda, C. Senyo, K. Sevior, M. E. Shapkin, M. Shibata, T. -A. Shiu, J. -G. Shwartz, B. Sibidanov, A. Simon, F. Smerkol, P. Sohn, Y. -S. Sokolov, A. Solovieva, E. Stanic, S. Staric, M. Sumiyoshi, T. Tatishvili, G. Teramoto, Y. Trabelsi, K. Tsuboyama, T. Uchida, M. Uehara, S. Uglov, T. Unno, Y. Uno, S. Vahsen, S. E. Vanhoefer, P. Varner, G. Wang, C. H. Wang, M, Z. Wang, P. Watanabe, Y. Williams, K. M. Won, E. Yamaoka, J. Yamashita, Y. Zhang, Z. P. Zhilich, V. Zhulanov, V. Belle Collaboration

    PHYSICAL REVIEW D   87 ( 3 )   031101   2013.02( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.87.031101

  • Analysis of the performance of a model quadrupole magnet for a linear accelerator Reviewed

    M. Masuzawa, K. Egawa, M. Iwasaki, T. Oki, N. Ohuchi, A. Terashima, K. Tsuchiya

    IEEE Transactions on Applied Superconductivity   23   2013.02( ISSN:10518223

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    Publishing type:Research paper (scientific journal)  

    A model quadrupole magnet for a future linear accelerator has been designed, fabricated, and tested at KEK. The model quadrupole is a superferric superconducting magnet with a design field gradient of 57 T/m. The design field gradient is obtained by saturating the iron yoke. Superferric magnets are considered to have the advantage of simplicity, less sensitivity to the position of the superconductor coils, and are therefore thought to be easier to construct and less expensive than usual superconducting magnets. However, if the iron is heavily saturated, the magnetic field becomes more sensitive to the coil positions. The magnetic properties of the magnet were measured with a harmonic coil, and its field gradient, effective length, and multipole components were compared with a 3D simulation. The results are presented and discussed in this paper. © 2012 IEEE.

    DOI: 10.1109/TASC.2012.2235498

  • Fabrication and testing of a model quadrupole magnet for linear accelerators Reviewed

    K. Tsuchiya, A. Terashima, N. Ohuchi, M. Masuzawa, K. Egawa, M. Iwasaki, T. Oki, Z. Zong, M. Tanaka, T. Endo, R. Matsuyama, K. Nakamura, Y. Chida, T. Semba

    IEEE Transactions on Applied Superconductivity   23   2013.02( ISSN:10518223

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    A model of a quadrupole magnet for linear accelerators was designed, fabricated, and tested at KEK in order to gain fabrication experience and a better understanding of superconducting magnet characteristics. The assembly has a design field gradient of 56.5 T/m, an aperture of 92 mm, and a cold mass length of 680 mm. Furthermore, it is designed as a superferric magnet with four racetrack coils wound with a specially fabricated ribbon cable of eight superconducting strands. In this paper, we present details of the magnet design, fabrication, and the results of its cold tests. Data of the field measurements are also presented in brief. © 2002-2011 IEEE.

    DOI: 10.1109/TASC.2012.2233841

  • The BaBar detector: Upgrades, operation and performance Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   729   615 - 701   2013.01( ISSN:01689002

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    The BaBar detector operated successfully at the PEP-II asymmetric e +e- collider at the SLAC National Accelerator Laboratory from 1999 to 2008. This report covers upgrades, operation, and performance of the collider and the detector systems, as well as the trigger, online and offline computing, and aspects of event reconstruction since the beginning of data taking. © 2013 Elsevier B.V.

    DOI: 10.1016/j.nima.2013.05.107

  • Direct wind superconducting corrector magnets for the superkekb IR International coauthorship

    B. Parker, M. Anerella, J. Escallier, A. Ghosh, A. Jain, A. Marone, P. Wanderer, Y. Arimoto, M. Iwasaki, N. Ohuchi, M. Tawada, K. Tsuchiya, H. Yamaoka, Z. Zong

    IPAC 2012 - International Particle Accelerator Conference 2012   2191 - 2193   2012.12( ISBN:978-395450115-1

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    Publishing type:Research paper (international conference proceedings)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Eight new superconducting interaction region (IR) quadrupoles and a variety ofcorrection and cancel coil windings are needed for the SuperKEKB luminosity upgradeunderway at KEK [1-2]. The correctors are required to fit in limited space inside the mainIR quadrupole bores. Because there is insufficient space for magnetic yokes for the magnetsclosest to the interaction point (IP), external field cancel coil windings are needed toremove non-linear fields that would otherwise impact beams passing close to the main magnetcoils. We are investigating if an additional cancel coil set would be useful to reducedetector background. The design and production of SuperKEKB corrector and cancel coils,using BNL Direct Wind magnet technology, is underway. Copyright © 2012 by IEEE.

  • Solenoid field calculation of the superkekb interaction region International coauthorship

    H. Yamaoka, Y. Arimoto, M. Iwasaki, H. Koiso, A. Morita, Y. Ohnishi, N. Ohuchi, K. Oide, M. Tawada, K. Tsuchiya

    IPAC 2012 - International Particle Accelerator Conference 2012   3548 - 3550   2012.12( ISBN:978-395450115-1

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    Publishing type:Research paper (international conference proceedings)   Kind of work:Joint Work   International / domestic magazine:International journal  

    The construction of SuperKEKB started from 2011. The design of the superconducting magnets in the interaction region is going with optimization of beam optics. The 3D model for calculating the solenoid field profile along each beam line has been developed. The calculated field profiles have already been involved in the calculations of the beam optics and the beam background noise. Copyright © 2012 by IEEE.

  • Beam background and MDI design for SuperKEKB/Belle-II Reviewed

    H. Nakayama, M. Iwasaki, K. Kanazawa, H. Nakano, Y. Ohnishi, S. Tanaka, T. Tsuboyama

    IPAC 2012 - International Particle Accelerator Conference 2012   1825 - 1827   2012.12

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    The Belle experiment, operated at the asymmetric electron-positron collider KEKB, hadaccumulated a data sample with an integrated luminosity of more than 1 ab-1before the shutdown in June 2010. We have started upgrading both the accelerator and thedetector, SuperKEKB and Belle-II, to achieve the target luminosity of 8 ×1035cm-2s-1. With the increased luminosity, the beam background willbe severe. The development of Machine- Detector Interface (MDI) design is crucial to copewith the increased background and protect Belle-II detector. We will present the estimationof impact from each beam background sources at SuperKEKB and our countermeasures for them,such as collimators to stop Touschek-scattered beam particles, Tungsten shield to protectinner detectors from shower particles, and dedicated beam pipe design around interactionpoint to stop synchrotron radiation, etc. Copyright © 2012 by IEEE.

  • Measurements of the T2K neutrino beam properties using the INGRID on-axis near detector Reviewed

    K. Abe, et. al. [T2K Collaboation]

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   694   211 - 223   2012.12( ISSN:01689002

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    Publishing type:Research paper (scientific journal)  

    Precise measurement of neutrino beam direction and intensity was achieved based on a new concept with modularized neutrino detectors. INGRID (Interactive Neutrino GRID) is an on-axis near detector for the T2K long baseline neutrino oscillation experiment. INGRID consists of 16 identical modules arranged in horizontal and vertical arrays around the beam center. The module has a sandwich structure of iron target plates and scintillator trackers. INGRID directly monitors the muon neutrino beam profile center and intensity using the number of observed neutrino events in each module. The neutrino beam direction is measured with accuracy better than 0.4 mrad from the measured profile center. The normalized event rate is measured with 4% precision. © 2012 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2012.03.023

  • Compact 8-LEAD unit for the SC correction coils of the superkekb IR magnet system Reviewed

    Z. G. Zong, N. Ohuchi, K. Tsuchiya, N. Higashi, M. Iwasaki, H. Yamaoka, M. Tawada

    AIP Conference Proceedings   1434   985 - 992   2012.08( ISSN:0094243X

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    Publishing type:Research paper (scientific journal)  

    In the proposed SuperKEKB interaction region (IR) magnet system 40 superconducting (SC) correction coils are designed to perform some specific functions with current of about 50 A. To energize these coils, 80 current leads will be mounted in the cryostats where the stringent spatial constraint and the cryogenic operation require a compact and optimum design. We propose a compact unit to integrate 8 helium vapor cooled leads (4 pairs). The 8 leads are made of brass and consist of two structures for the transported current and helium vapor, which are designed and simulated by finite element model (FEM). This paper will introduce the material selection and structure details. To equalize the temperature profiles of the individual leads under the different currents and helium flows, some copper blocks are placed between leads. In the cold test, the 8 leads were operated in the nominal mode and responded safely to some transient situation. This paper will present the thermal and electrical comparison between the experimental results and numerical calculation. © 2012 American Institute of Physics.

    DOI: 10.1063/1.4707016

  • Development of the Superconducting Quadrupole Magnet for the SuperKEKB Final Focusing System Reviewed

    Masako Iwasaki, Norihito Ohuchi, Kiyosumi Tsuchiya, Masafumi Tawada, Norio Higashi, Zhanguo Zong, Toshiyuki Oki

    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   22 ( 3 )   - 7   2012.06( ISSN:1051-8223

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    We have developed the superconducting final-focus quadrupoles for SuperKEKB, the next generation B-factory experiment in Japan. The system consists of four quadrupole doublets for incoming and outgoing electron and positron beams, respectively. A R&D superconducting quadrupole magnet was fabricated. In this paper, we describe the results on the excitation test and the magnetic field measurements of this R&D magnet.

    DOI: 10.1109/TASC.2011.2182022

  • First muon-neutrino disappearance study with an off-axis beam Reviewed International coauthorship

    Abe K., ..., Iwasaki M., 他 T2K Collaboration

    PHYSICAL REVIEW D   85 ( 3 )   2012.02( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.85.031103

  • Design study of final focusing superconducting magnets for the superkekb Reviewed International coauthorship

    M. Tawada, N. Ohuchi, M. Iwasaki, K. Tsuchiya, T. Oki, Z. G. Zong, N. Higashi, H. Yamaoka, H. Koiso, A. Morita, Y. Ohnishi, K. Oide

    IPAC 2011 - 2nd International Particle Accelerator Conference   2457 - 2459   2011.12( ISBN:978-929083366-6

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    Publishing type:Research paper (international conference proceedings)   Kind of work:Joint Work   International / domestic magazine:International journal  

    SuperKEKB is the upgrade project of KEKB [1]. We have performed the design study of the final focus superconducting magnets for the SuperKEKB interaction region (IR). These must be located as close to the interaction point (IP) as possible so that each beams can be squeezed to the small vertical beam size of 60 nm. While the space constraints are very severe, the wider aperture with good field quality is required. In this paper, the design status of final focusing system is reported. Copyright © 2011 by IPAC'11/EPS-AG.

  • Beam background and MDI design for superkekb/belle-ii Reviewed

    H. Nakayama, M. Iwasaki, K. Kanazawa, H. Nakano, Y. Ohnishi, S. Tanaka, T. Tsuboyama

    IPAC 2011 - 2nd International Particle Accelerator Conference   3702 - 3704   2011.12

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    Publishing type:Research paper (scientific journal)  

    The Belle experiment, operated at the asymmetric electron-positron collider KEKB, had accumulated a data sample with an integrated luminosity of more than 1 ab-1 before the shutdown in June 2010. We have started upgrading both the accelerator and the detector, SuperKEKB and Belle-II, to achieve the target luminosity of 8 × 1035cm-2s-1. With the increased luminosity, the beam background will be severe. The development of Machine- Detector Interface (MDI) design is crucial to cope with the increased background and protect Belle-II detector. We will present the estimation of impact from each beam background sources at SuperKEKB and our countermeasures for them, such as collimators to stop Touschek-scattered beam particles, Tungsten shield to protect inner detectors from shower particles, and dedicated beam pipe design around interaction point to stop synchrotron radiation, etc. Copyright © 2011 by IPAC&#039;11/EPS-AG.

  • The T2K experiment Reviewed

    K. Abe, et. al. [T2K Collaboation]

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   659 ( 1 )   106 - 135   2011.12( ISSN:01689002

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    The T2K experiment is a long baseline neutrino oscillation experiment. Its main goal is to measure the last unknown lepton sector mixing angle θ13 by observing νe appearance in a νμ beam. It also aims to make a precision measurement of the known oscillation parameters, Δ232+ and sin22θ23, via νμ disappearance studies. Other goals of the experiment include various neutrino cross-section measurements and sterile neutrino searches. The experiment uses an intense proton beam generated by the J-PARC accelerator in Tokai, Japan, and is composed of a neutrino beamline, a near detector complex (ND280), and a far detector (Super-Kamiokande) located 295 km away from J-PARC. This paper provides a comprehensive review of the instrumentation aspect of the T2K experiment and a summary of the vital information for each subsystem. © 2011 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2011.06.067

  • Indication of Electron Neutrino Appearance from an Accelerator-Produced Off-Axis Muon Neutrino Beam Reviewed International coauthorship

    Abe K., ..., Iwasaki M., 他 T2K Collaboration

    PHYSICAL REVIEW LETTERS   107 ( 4 )   2011.07( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.107.041801

  • Design and Construction of the Final Focus Quadrupole R&D Magnet for Super-KEKB Reviewed

    Ohuchi Norihito, Tsuchiya Kiyosumi, Tawada Masafumi, Higashi Norio, Iwasaki Masako, Zong Zhanguo

    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   21 ( 3 )   1829 - 1832   2011.06( ISSN:1051-8223

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    DOI: 10.1109/TASC.2010.2085031

  • Observation of two charged bottomonium-like resonances International coauthorship

    I. Adachi, et. al. [Belle Collaboation]

    Proceedings of the 9th International Conference on Flavor Physics and CP Violation, FPCP 2011   2011.01

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    We report the observation of two narrow structures at 10610 MeV/c 2 and 10650 MeV/c2 in the π ±γ(nS) (n = 1,2,3) and π±hb(mP) (m = 1,2) mass spectra that are produced in association with a single charged pion in γ(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M1 = 10608.4 ± 2.0MeV/c2, γ1 = 15.6 ± 2.5 MeV and M 2 = 10653.2 ± 1.5 MeV/c2, γ2 = 14.4 ±3.2 MeV. Analysis favors quantum numbers of IG(J P)=1+(1+) for both states. The results are obtained with a 121.4 fb-1 data sample collected with the Belle detector near the γ(5S) resonance at the KEKB asymmetric-energy e+e- collider.

  • Progress of design study of interaction region quadrupoles for the super-KEKB Reviewed

    M. Tawada, N. Ohuchi, Y. Funakoshi, M. Iwasaki, H. Koiso, A. Monta, Y. Ohnishi, K. Oide, K. Tsuchiya, Z. G. Zong

    IPAC 2010 - 1st International Particle Accelerator Conference   346 - 348   2010.12

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    For KEKB upgrade, we are studying the design of the final focus quadrupoles to achieve very small β-functions at the interaction point (IP). For each beam, the final beam focusing system consists of quadrupole-doublet of the superconducting and permanent magnets. In this paper, the design progress of final focusing magnets is reported.

  • Recent progress of KEKB Invited Reviewed

    Y. Funakoshi, T. Abe, K. Akai, Y. Cai, K. Ebihara, K. Egawa, A. Enomoto, J. Flanagan, H. Fukuma, K. Furukawa, T. Furuya, J. Haba, T. Ieiri, N. Iida, H. Ikeda, T. Ishibashi, M. Iwasaki, T. Kageyama, S. Kamada, T. Kamitani, S. Kato, M. Kikuchi, E. Kikutani, H. Koiso, M. Masuzawa, T. Mimashi, T. Miura, A. Morita, T. T. Nakamura, K. Nakanishi, M. Nishiwaki, Y. Ogawa, K. Ohmi, Y. Ohnishi, N. Ohuchi, K. Oide, T. Oki, M. Ono, M. Satoh, Y. Seimiya, K. Shibata, M. Suetake, Y. Suetsugu, T. Sugimura, Y. Susaki, T. Suwada, M. Tawada, M. Tejima, M. Tobiyama, N. Tokuda, S. Uehara, S. Uno, Y. Yamamoto, Y. Yano, K. Yokoyama, Mi Yoshida, S. Yoshimoto, D. Zhou, Z. Zong

    IPAC 2010 - 1st International Particle Accelerator Conference   2372 - 2374   2010.12( ISBN:978-929083352-9

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    The skew-sextupole magnets contributed to the luminosity improvement at KEKB. The luminosity gain by the crab cavities was measured as about 20% with the skew-sextupole magnets. The peak luminosity surpassed 2 × 10 34cm-2s-1 which is twice as high as the design value. The specific luminosity and the vertical beam-beam parameter are still much lower than the predictions by the beam-beam simulation with crab crossing. The total integrated luminosity accumulated by the Belle detector surpassed 1000 fb-1 which is one of the initial goals of KEKB/Belle.

  • Evaluation of the detector BG for SuperKEKB International coauthorship

    M. Iwasaki, S. Sugihara, H. Aihara, Y. Funakoshi, J. Haba, N. Iida, K. Kanazawa, H. Koiso, H. Nakano, C. Ng, Y. Ohnishi, K. Shibata, S. Tanaka, T. Tsuboyama, S. Uno, Y. Ushiroda, H. Yamamoto

    IPAC 2010 - 1st International Particle Accelerator Conference   1557 - 1559   2010.12( ISBN:978-929083352-9

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    Authorship:Lead author   Publishing type:Research paper (international conference proceedings)   Kind of work:Joint Work   International / domestic magazine:International journal  

    SuperKEKB is the upgrade plan of the current B-factory experiment with the KEKB accelerator at KEK. Its luminosity is designed to be 8×10 35 /cm 2 /s (40 times higher than KEKB) and the integrated luminosity is expected to be 50 ab -1 . In SuperKEKB, it is important to evaluate the beam induced BG and design the interaction region (IR) to assure the stable detector operation. To estimate the beam induced BG, we construct the beam-line simulation based on the GEANT4 simulation. To study the particle BG features, we did the background studies during the 2009 fall Belle runs. In this paper, we report the BG evaluation for SuperKEKB.

  • Measurement of ηη production in two-photon collisions Reviewed

    S. Uehara, Y. Watanabe, H. Nakazawa, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   82 ( 11 )   2010.12( ISSN:15507998

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    We report the first measurement of the differential cross section for the process γγ→ηη in the kinematic range above the ηη threshold, 1.096GeV<W<3.8GeV over nearly the entire solid angle range, |cosθ⊃*|≤0.9 or ≤1.0 depending on W, where W and θ⊃* are the energy and η scattering angle, respectively, in the γγ center-of-mass system. The results are based on a 393fb⊃-1 data sample collected with the Belle detector at the KEKB e⊃+e⊃- collider. In the W range 1.1-2.0GeV/c2 we perform an analysis of resonance amplitudes for various partial waves, and at higher energy we compare the energy and the angular dependences of the cross section with predictions of theoretical models and extract contributions of the χcJ charmonia. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.82.114031

  • R&D status of a large-aperture hybrid avalanche photo-detector Reviewed

    Abe Toshinori, Aihara Hiroaki, Iwasaki Masako, Fujimori Hiroki, Kasimura Keizo, Mineo Sogo, Uchida Tomohisa, Tanaka Manobu, Kawai Yoshihiko, Kyushima Hiroyuki, Suyama Motohiro, Shiozawa Masato

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   623 ( 1 )   279 - 281   2010.11( ISSN:0168-9002

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    DOI: 10.1016/j.nima.2010.02.221

  • Search for B-s(0) -> hh decays at the Y(5S) resonance Reviewed International coauthorship

    Peng C. -C., Chang P., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   82 ( 7 )   2010.10( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.82.072007

  • Measurement of CP violating asymmetries in B0→K+K -KS0 decays with a time-dependent Dalitz approach Reviewed

    Y. Nakahama, K. Sumisawa, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   82 ( 7 )   2010.10( ISSN:15507998

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    We report a measurement of CP violating asymmetries in B0(B ̄0)→K+K-KS0 decays with a time-dependent Dalitz approach. This analysis is based on a data sample of 657×106 BB̄ pairs accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. As the result of an unbinned maximum likelihood fit to the selected candidates, the mixing-induced and direct CP violation parameters φ 1eff and ACP are obtained for B0→φ(1020)KS0, B0→f 0(980)KS0, and other B0→K+K-KS0 decays. We find four solutions that describe the data. There are φ1eff(B0→φ (1020)KS0)=(32.2±9.0±2.6±1.4)°;φ1eff(B0→φ (1020)KS0)=(26.2±8.8±2.7±1.2)°;φ1eff(B0→φ (1020)KS0)=(27.3±8.6±2.8±1.3)°;andφ1eff(B0→ φ(1020)KS0)=(24.3±8.0±2.9±5.2)°. The values for the CP violating phase in B0→φ(1020)KS0 are similar, but other properties of the Dalitz plot are quite different for the four solutions. These four solutions have consistent φ1eff values for all three B-meson decay channels and none of them deviates significantly from the values measured in B→(cc̄)K0 decays with the currently available statistics. In addition, we find no significant direct CP violation. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.82.073011

  • Search for lepton flavor violating tau(-) decays into l(-)K(S)(0) l(-)K(S)(0)K(S)(0) Reviewed International coauthorship

    Miyazaki Y., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICS LETTERS B   692 ( 1 )   4 - 9   2010.08( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2010.07.012

  • Evidence for B -> K eta 'gamma decays at Belle Reviewed International coauthorship

    Wedd R., , ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   81 ( 11 )   2010.06( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.81.111104

  • Evidence for direct CP violation in the decay B±→ D(*)K±, D→KS0π+π - and measurement of the CKM phase φ3 Reviewed

    A. Poluektov, A. Bondar, B. D. Yabsley, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   81   2010.06( ISSN:15507998

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    We present a new measurement of the unitarity triangle angle φ3 using a Dalitz plot analysis of the KS0π+π- decay of the neutral D meson produced in B±→D(*) K± decays. The method exploits the interference between D0 and D̄0 to extract the angle φ3, strong phase δ, and the ratio r of suppressed and allowed amplitudes. We apply this method to a 605fb-1 data sample collected by the Belle experiment. The analysis uses three decays: B±→DK±, and B ±→D*K± with D *→Dπ0 and D*→Dγ, as well as the corresponding charge-conjugate modes. From a combined maximum likelihood fit to the three modes, we obtain φ3=78.4°+10.8°-11. 6°±3.6°(syst)±8.9°(model). CP conservation in this process is ruled out at the confidence level (1-CL)=5×10-4, or 3.5 standard deviations. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.81.112002

  • Measurement of the branching fractions and the invariant mass distributions for τ-→h-h+h-ντ decays Reviewed

    M. J. Lee, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   81 ( 11 )   2010.06( ISSN:15507998

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    We present a study of τ-→π -π+π-ντ, τ -→K-π+π-ντ, τ-→K-K+π-ντ, and τ-→K-K+K-ντ decays using a 666fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at and near a center-of-mass energy of 10.58 GeV. The branching fractions are measured to be B(τ-→π-π+π -ντ)=(8.42±0.00-0.25+0.26)×10-2, B(τ-→K-π+π-ντ) =(3.30±0.01-0.17+0.16)×10-3, B(τ -→K-K+π-ντ)=(1. 55±0.01-0.05+0.06)×10-3, and B(τ -→K-K+K-ντ)=(3. 29±0.17-0.20+0.19)×10-5, where the first uncertainty is statistical and the second is systematic. These branching fractions do not include contributions from modes in which a π+π- pair originates from a KS0 decay. We also present the unfolded invariant mass distributions for these decays. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.81.113007

  • Observation of Bs0→Ds*-π+ and Bs0→Ds(*) -ρ+ and measurement of the Bs0→Ds*-ρ+ longitudinal polarization fraction Reviewed

    R. Louvot, O. Schneider, et. al. [Belle Collaboation]

    Physical Review Letters   104 ( 23 )   2010.06( ISSN:00319007

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    First observations of the Bs0→Ds*-π+, Bs0→Ds-ρ+ and Bs0→Ds*-ρ+ decays are reported together with measurements of their branching fractions: B(Bs0→Ds*-π+)=[2.4-0.4+0.5(stat)±0.3(syst) ±0.4(fs)]×10-3, B(Bs0→Ds-ρ+)=[8.5-1. 2+1.3(stat)±1.1(syst)±1.3(fs)]×10-3 and B(Bs0→Ds*-ρ+)=[11.9-2.0+2.2(stat)±1.7(syst) ±1.8(fs)]×10-3 (fs=NBs(*)B̄s(*)/ Nbb̄). From helicity-angle distributions, we measured the longitudinal polarization fraction in Bs0→Ds*-ρ+ decays to be fL(Bs0→Ds*-ρ+)=1.05-0.10+0.08(stat)-0.04+0.03(syst). These results are based on a 23.6fb-1 data sample collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e - collider. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevLett.104.231801

  • Search for CP violation in the decays D(s)+→KS0π+ and D(s)+→KS0K+ Reviewed

    B. R. Ko, E. Won, et. al. [Belle Collaboation]

    Physical Review Letters   104 ( 18 )   2010.05( ISSN:00319007

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    We have searched for CP violation in the charmed meson decays D(s)+→KS0π+ and D(s)+→KS0K+ using 673fb -1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No evidence for CP violation is observed. We report the most sensitive CP asymmetry measurements to date for these decays: ACPD+→KS0π+=(-0. 71±0.19±0.20)%, ACPDs+→KS0π+=(+5.45±2. 50±0.33)%, ACPD+→KS0K+=(-0.16±0. 58±0.25)%, and ACPDs+→KS0K+=(+0.12±0.36±0. 22)%, where the first uncertainties are statistical and the second are systematic. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevLett.104.181602

  • Search for lepton-flavor-violating tau decays into three leptons with 719 million produced tau(+)tau(-) pairs Reviewed International coauthorship

    Hayasaka K., Inami K., Miyazaki Y., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICS LETTERS B   687 ( 2-3 )   139 - 143   2010.04( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1016/j.physletb.2010.03.037

  • Search for B0→K*0K̄*0, B0→K*0K*0 and B0→K+π-Kπ± decays Reviewed

    C. C. Chiang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   81 ( 7 )   2010.04( ISSN:15507998

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    We report a search for the decays B0→K*0K ̄*0 and B0→K*0K *0. We also measure other charmless decay modes with K +π-K-π+ and K +π-K+π- final states. The results are obtained from a data sample containing 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e +e- collider. We set upper limits on the branching fractions for B0→K*0K̄*0 and B0→K*0K*0 of 0.81×10 -6 and 0.20×10-6, respectively, at the 90% confidence level. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.81.071101

  • Evidence for a New Resonance and Search for the Y(4140) in the gamma gamma -> phi J/psi Process Reviewed International coauthorship

    Shen C. P., Yuan C. Z., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW LETTERS   104 ( 11 )   2010.03( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.104.112004

  • Observation of a Charmoniumlike Enhancement in the gamma gamma ->omega J/psi Process Reviewed International coauthorship

    Uehara S., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW LETTERS   104 ( 9 )   2010.03( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.104.092001

  • Measurement of the branching fractions for B0→Ds*+π - and B0→Ds*-K+ decays Reviewed

    N. J. Joshi, T. Aziz, K. Trabelsi, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   81 ( 3 )   2010.02( ISSN:15507998

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    We present a study of B0→Ds*+π- and B0→Ds*-K+ decays based on a sample of 657×106 BB̄ events collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the branching fractions to be B(B0→Ds*+π-)=(1.75±0.34(stat)±0.17(syst) ±0.11(B))×10-5 and B(B0→Ds*-K +)=(2.02±0.33(stat)±0.18(syst)±0.13(B)) ×10-5, with significances of 6.1 and 8.0 standard deviations, respectively. The first uncertainty is statistical, the second is due to the experimental systematics, and the third is from uncertainties in the Ds+ decay branching fractions. From our measurements, we obtain the most precise determination so far of RD*π, where RD*π is the ratio between amplitudes of the doubly Cabibbo-suppressed decay B0→D*+π- and the Cabibbo-favored B0→D*-π+ decay. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.81.031101

  • Study of the B→X(3872)(→D*0D̄0)K decay Reviewed

    T. Aushev, N. Zwahlen, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   81 ( 3 )   2010.02( ISSN:15507998

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    We present a study of B→X(3872)K with X(3872) decaying to D*0D̄0 using a sample of 657×106 BB̄ pairs recorded at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Both D*0→D0γ and D*0→D0π0 decay modes are used. We find a peak of 50.1-11.1+14.8 events with a mass of (3872.9-0.4-0.5+0.6+0.4)MeV/c2, a width of (3.9-1.4-1.1+2.8+0.2)MeV/c2 and a product branching fraction B(B→X(3872)K)×B(X(3872)→D*0D̄0)=(0. 80±0.20±0.10)×10-4, where the first errors are statistical and the second ones are systematic. The significance of the signal is 6.4σ. The difference between the fitted mass and the D*0D̄0 threshold is calculated to be (1.1-0.4-0.3+0.6+0.1)MeV/c2. We also obtain an upper limit on the product of branching fractions B(B→Y(3940)K) ×B(Y(3940)→D*0D̄0) of 0.67×10 -4 at 90% CL. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.81.031103

  • Search for lepton flavor and lepton number violating tau decays into a lepton and two charged mesons Reviewed

    Miyazaki Y., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICS LETTERS B   682 ( 4-5 )   355 - 362   2010.01( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2009.11.061

  • Measurement of CP asymmetries in B-0 -> K-0 pi(0) decays Reviewed

    Fujikawa M., Yusa Y., Dalseno J., Hazumi M., Sumisawa K., ..., Iwasaki M., 他 Belle Collaboration

    PHYSICAL REVIEW D   81 ( 1 )   2010.01( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.81.011101

  • Measurement of |Vub| from inclusive charmless semileptonic B decays Reviewed

    P. Urquijo, E. Barberio, et. al. [Belle Collaboation]

    Physical Review Letters   104 ( 2 )   2010.01( ISSN:00319007

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    We present the partial branching fraction for inclusive charmless semileptonic B decays and the corresponding value of the Cabibbo-Kobayashi- Maskawa matrix element |Vub|, using a multivariate analysis method to access ∼90% of the B→Xu ν phase space. This approach dramatically reduces the theoretical uncertainties from the b-quark mass and nonperturbative QCD compared to all previous inclusive measurements. The results are based on a sample of 657×106 BB̄ pairs collected with the Belle detector. We find that ΔB(B→Xu ν;p *B>1.0GeV/c)=1. 963×(1±0.088stat±0.081syst)×10-3. Corresponding values of |Vub| are extracted using several theoretical calculations. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevLett.104.021801

  • The SuperKEKB accelerator status International coauthorship

    Masako Iwasaki

    35TH INTERNATIONAL CONFERENCE OF HIGH ENERGY PHYSICS (ICHEP 2010)   2010

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    Publishing type:Research paper (international conference proceedings)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.22323/1.120.0519

  • R&D Status of HAPD

    Toshinori Abe, Hiroaki Aihara, Masako Iwasaki, Manobu Tanaka, Yoshihiko Kawai, Hiroyuki Kyushima, Motohiro Suyama, Masato Shiozawa

    Proceedings of Science   2009.12( ISSN:18248039

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    We are reporting the R&D status of a large-aperture Hybrid Avalanche Photo-Detector (HAPD). We have developed a 13-inch aperture HAPD. The HAPD is a photo detector expected to replace the photomultiplier tube (PMT) in next-generation imaging water Cherenkov detectors such as Hyper Kamiokande. We will present the excellent performance of the HAPD (~200 ps time resolution and single photon sensitivity). We will also describe the readout and high-voltage power supply designed for the HAPD.

  • Measurement of D+→KS0K+ and Ds+→KS0π+ branching ratios Reviewed

    E. Won, B. R. Ko, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   80 ( 11 )   2009.12( ISSN:15507998

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    We report an improved measurement of D+→KS0K+ and Ds+→KS0π+ branching ratios using 605fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured branching ratios with respect to the Cabibbo-favored modes are B(D+→KS0K+)/B(D+→KS0π+)=0. 1899±0.0011±0.0022 and B(Ds+→KS0π+)/B(Ds+→KS0K+)=0. 0803±0.0024±0.0019 where the first uncertainties are statistical and the second are systematic. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.80.111101

  • Measurement of cross sections of exclusive e+ e- → V P processes at sqrt(s) = 10.58 GeV Reviewed

    K. Belous, M. Shapkin, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   681 ( 5 )   400 - 405   2009.11( ISSN:03702693

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    The cross sections for the reactions e+ e- → φ{symbol} η, φ{symbol} η′, ρη, ρ η′ have been measured using a data sample of 516 fb- 1 collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. The corresponding values of the cross sections are: 1.4 ± 0.4 ± 0.1 fb (φ{symbol} η), 5.3 ± 1.1 ± 0.4 fb (φ{symbol} η′), 3.1 ± 0.5 ± 0.1 fb (ρ η) and 3.3 ± 0.6 ± 0.2 fb (ρ η′). The energy dependence of the cross sections is presented using Belle measurements together with those of CLEO and BaBar. © 2009 Elsevier B.V.

    DOI: 10.1016/j.physletb.2009.10.037

  • Measurement of the e(+)e(-)->(DD*-)-D-0 pi(+) cross section using initial-state radiation Reviewed International coauthorship

    Pakhlova G., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   80 ( 9 )   2009.11( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.80.091101

  • International Scoping Study (ISS) for a future neutrino factory and Super-Beam facility. Detectors and flux instrumentation for future neutrino facilities Reviewed

    T. Abe, H. Aihara, C. Andreop Oulos, A. Ankowski, A. Badertscher, G. Battistoni, A. Blondel, J. Bouchez, A. Bross, A. Bueno, L. Camilleri, J. E. Campagne, A. Cazes, A. Cervera-Villanueva, G. De Lellis, F. Di Capua, M. Ellis, A. Ereditato, L. S. Esposito, C. Fukushima, E. Gschwendtner, J. J. Gomez-Cadenas, M. Iwasaki, K. Kaneyuki, Y. Karadzhov, V. Kashikhin, Y. Kawai, M. Komatsu, E. Kozlovskaya, Y. Kudenko, A. Kusaka, H. Kyushima, A. Laing, K. Long, A. Longhin, A. Marchionni, A. Marotta, C. McGrew, S. Menary, A. Meregaglia, M. Mezzeto, P. Migliozzi, N. K. Mondal, C. Montanari, T. Nakadaira, M. Nakamura, H. Nakumo, H. Nakayama, J. Nelson, J. Nowak, S. Ogawa, J. Peltoniemi, A. Pla-Dalmau, S. Ragazzi, A. Rubbia, F. Sanchez, J. Sarkamo, O. Sato, M. Selvi, H. Shibuya, M. Shozawa, J. Sobczyk, F. J.P. Soler, P. Strolin, M. Suyama, M. Tanaka, F. Terranova, R. Tsenov, Y. Uchida, A. Weber, A. Zlobin

    Journal of Instrumentation   4   2009.11( ISSN:17480221

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    This report summarises the conclusions from the detector group of the International Scoping Study of a future Neutrino Factory and Super-Beam neutrino facility. The baseline detector options for each possible neutrino beam are defined as follows: A very massive (Megaton) water Cherenkov detector is the baseline option for a sub-GeV Beta Beam and Super Beam facility. There are a number of possibilities for either a Beta Beam or Super Beam (SB) medium energy facility between 1-5 GeV. These include a totally active scintillating detector (TASD), a liquid argon TPC or a water Cherenkov detector. A 100 kton magnetized iron neutrino detector (MIND) is the baseline to detect the wrong sign muon final states (golden channel) at a high energy (20-50 GeV) neutrino factory from muon decay. A 10 kton hybrid neutrino magnetic emulsion cloud chamber detector for wrong sign tau detection (silver channel) is a possible complement to MIND, if one needs to resolve degeneracies that appear in the δ- θ13 parameter space. © 2009 IOP Publishing Ltd and SISSA.

    DOI: 10.1088/1748-0221/4/05/T05001

  • Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for B -> K((*))l(+) l(-) Reviewed International coauthorship

    Wei J-T., Chang P., et. al. [Belle Collaboation]

    PHYSICAL REVIEW LETTERS   103 ( 17 )   2009.10( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.103.171801

  • Measurements of charmless hadronic b→s penguin decays in the π+π-K+π- final state and first observation of B0→ρ0K+π- Reviewed

    S. H. Kyeong, Y. J. Kwon, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   80 ( 5 )   2009.09( ISSN:15507998

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    We report measurements of charmless hadronic B0 decays into the π+π-K+π- final state. The analysis uses a sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at the resonance. The decay B0→ρ0K+π- is observed for the first time; the significance is 5.0σ and the corresponding partial branching fraction for MKπ(0.75,1.20)GeV/c2 is [2.8±0.5(stat) ±0.5(syst)]×10-6. We also obtain the first evidence for B0→f0(980)K+π- with 3.5σ significance and for B0→π+π- K*0 with 4.5σ significance. For the two-body decays B0→ρ0K*0 and B0→f0(980)K*0, the significances are 2.7σ and 2.5σ, respectively, and the upper limits on the branching fractions are 3.4×10-6 and 2.2×10-6 at 90% confidence level. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.80.051103

  • Measurement of y(CP) in D-0 meson decays to the (KSK+K-)-K-0 final state Reviewed International coauthorship

    Zupanc A., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   80 ( 5 )   2009.09( ISSN:1550-7998

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.80.052006

  • Measurement of B -> D-s(()*K-)pi branching fractions Reviewed International coauthorship

    Wiechczynski J., Lesiak T., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   80 ( 5 )   2009.09( ISSN:1550-7998

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.80.052005

  • Dalitz analysis of B -> K pi(+)psi ' decays and the Z(4430)(+) Reviewed International coauthorship

    Mizuk R., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   80 ( 3 )   2009.08( ISSN:1550-7998

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.80.031104

  • Observation of the phi(1680) and the Y(2175) in e(+)e(-) -> phi pi(+)pi(-) Reviewed International coauthorship

    Shen C. P., Yuan C. Z., Wang P., Wang X. L., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   80 ( 3 )   2009.08( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.80.031101

  • High-statistics study of eta pi(0) production in two-photon collisions Reviewed International coauthorship

    Uehara S., Watanabe Y., Nakazawa H., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   80 ( 3 )   2009.08( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.80.032001

  • Observation of the doubly cabibbo-suppressed decay Ds+→K+K+π- Reviewed

    B. R. Ko, E. Won, et. al. [Belle Collaboation]

    Physical Review Letters   102 ( 22 )   2009.06( ISSN:00319007

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    We report the first observation of the doubly Cabibbo-suppressed decay Ds+→K+K+π- using 605fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching ratio with respect to its Cabibbo-favored counterpart B(Ds+→K+K+π-)/B(Ds+→K+K-π+) is (0.229±0.028±0.012)%, where the first uncertainty is statistical and the second is systematic. We also report a significantly improved measurement of the doubly Cabibbo-suppressed decay D+→K+π+π-, with a branching ratio B(D+→K+π+π-)/B(D+→K-π+π+)=(0.569±0. 018±0.014)%. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevLett.102.221802

  • Time-dependent Dalitz plot measurement of CP parameters in B-0 -> K-S(0)pi(+)pi(-) decays Reviewed International coauthorship

    Dalseno J., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   79 ( 7 )   2009.04( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.79.072004

  • Search for the X(1812) in B±→K±ωΦ Reviewed

    C. Liu, Z. P. Zhang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   79 ( 7 )   2009.04( ISSN:15507998

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    Publishing type:Research paper (scientific journal)  

    We report on a search for the X(1812) state in the decay B±→K±ω with a data sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider. No significant signal is observed. An upper limit B(B±→K±X(1812) ,X(1812)→ω)<3.2×10-7 (90% C.L.) is determined. We also constrain the three-body decay branching fraction to be B(B±→ K±ω)<1.9×10-6 (90% C.L.). © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.79.071102

  • Observation of B-0 -> Lambda(Lambda)over-barK(0) and B-0 -> Lambda(Lambda)over-barK*(0) at Belle Reviewed International coauthorship

    Chang Y. -W., Wang M. -Z., et. al. [Belle Collaboation]

    PHYSICAL REVIEW D   79 ( 5 )   2009.03( ISSN:1550-7998

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.79.052006

  • Search for lepton-flavor-violating τ decay into a lepton and an f<inf>0</inf> (980) meson Reviewed

    Y. Miyazaki, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   672 ( 4-5 )   317 - 322   2009.03( ISSN:03702693

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    We search for lepton-flavor-violating τ decays into a lepton (electron or muon) and an f0 (980) meson using 671 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No events are observed and we set the following 90% C.L. upper limits on the branching fraction products: B (τ- → e- f0 (980)) × B (f0 (980) → π+ π-) < 3.2 × 10- 8 and B (τ- → μ- f0 (980)) × B (f0 (980) → π+ π-) < 3.4 × 10- 8. This is the first search performed for these modes. © 2009 Elsevier B.V.

    DOI: 10.1016/j.physletb.2009.01.058

  • Study of Omega(0)(c) and Omega(c)*(0) baryons at Belle Reviewed International coauthorship

    Solovieva E., Chistov R., et. al. [Belle Collaboation]

    PHYSICS LETTERS B   672 ( 1 )   1 - 5   2009.02( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1016/j.physletb.2008.12.062

  • Measurement of the decay Bs0→Ds-π+ and evidence for Bs0→Ds K± in e+e- annihilation at s 10.87GeV Reviewed

    R. Louvot, J. Wicht, O. Schneider, et. al. [Belle Collaboation]

    Physical Review Letters   102 ( 2 )   2009.01( ISSN:00319007

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    We have studied Bs0→Ds-π+ and Bs0→Ds K± decays using 23.6fb-1 of data collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e- collider. This highly pure Bs0→Ds-π+ sample is used to measure the branching fraction, B(Bs0→Ds-π+)=[3.67-0.33+0.35(stat)-0. 42+0.43(syst)±0.49(fs)]×10-3 (fs=NBs(*)B̄s(*)/ Nbb̄) and the fractions of Bs0 event types at the Υ(5S) energy, in particular NBs*B̄s*/NBs(*)B̄s(*)=(90.1-4.0+3. 8±0.2)%. We also determine the masses M(Bs0)=(5364.4±1.3±0. 7)MeV/c2 and M(Bs*)=(5416.4±0.4±0.5)MeV/c2. In addition, we observe Bs0→Ds K± decays with a significance of 3.5σ and measure B(Bs0→Ds K±)=[2.4-1.0+1.2(stat)±0.3(syst)±0. 3(fs)]×10-4. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevLett.102.021801

  • IP beam size measurement during collisions at super-KEKB Reviewed

    M. Iwasaki, T. Tauchi, T. Tsuboyama

    IEEE Nuclear Science Symposium Conference Record   276 - 278   2009( ISSN:1095-7863

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    We report studies of the direct IP beam size measurement during collisions at the future Super-KEKB asymmetric energy e+e- collider experiment by using e+e- pairs. A large number of e +e- pairs are produced during the collisions and deflected in a strong Coulomb potential made by an oncoming beam. Since the potential depends on the vertical and horizontal beam sizes, the deflected pairs are expected to carry the beam size information, especially in their angular distributions. This IP beam size measurement method has been developed for the future e+e- linear collider experiments, where the huge number of e+e- pairs and the strong Coulomb potential are expected because of their high energy beam collisions. We describe the idea of the application to the beam size measurement at Super-KEKB based on its superior high luminosity, and show the first results of the simulation studies. ©2009 IEEE.

    DOI: 10.1109/NSSMIC.2009.5401756

  • IP Beam Size Measurement During Collisions at Super-KEKB Reviewed

    M. Iwasaki, T. Tauchi, T. Tsuboyama

    IEEE 2009 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-5   276 - +   2009( ISSN:1082-3654

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    Publishing type:Research paper (scientific journal)  

    We report studies of the direct IP beam size measurement during collisions at the future Super-KEKB asymmetric energy e(+)e(-) collider experiment by using e(+)e(-) pairs. A large number of e(+)e(-) pairs are produced during the collisions and deflected in a strong Coulomb potential made by an oncoming beam. Since the potential depends on the vertical and horizontal beam sizes, the deflected pairs are expected to carry the beam size information, especially in their angular distributions. This IP beam size measurement method has been developed for the future e(+)e(-) linear collider experiments, where the huge number of e(+)e(-) pairs and the strong Coulomb potential are expected because of their high energy beam collisions. We describe the idea of the application to the beam size measurement at Super-KEKB based on its superior high luminosity, and show the first results of the simulation studies.

  • Measurement of the Time-Dependent CP Asymmetries in B-0 -> K-S(0)rho(0)gamma Decays Reviewed International coauthorship

    Li J., et. al. [Belle Collaboation]

    PHYSICAL REVIEW LETTERS   101 ( 25 )   2008.12( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.101.251601

  • Search for a CP asymmetry in Cabibbo-suppressed D-0 decays Reviewed International coauthorship

    Staric M., et. al. [Belle Collaboation]

    PHYSICS LETTERS B   670 ( 3 )   190 - 195   2008.12( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1016/j.physletb.2008.10.052

  • Evidence for Neutral B Meson Decays to omega K*(0) Reviewed International coauthorship

    Goldenzweig P., Schwartz A. J., et. al. [Belle Collaboation]

    PHYSICAL REVIEW LETTERS   101 ( 23 )   2008.12( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.101.231801

  • Measurement of B0→π+π-π+π- decays and search for B0→ρ0ρ0 Reviewed

    C. C. Chiang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 11 )   2008.12( ISSN:15507998

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    We report on a search for the decay B0→ρ0ρ0 and other charmless modes with a π+π-π+π- final state, including B0→ρ0π+π-, nonresonant B0→4π±, B0→ρ0f0(980), B0→f0(980)f0(980) and B0→f0(980)π+π-. These results are obtained from a data sample containing 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We set an upper limit on B(B0→ρ0ρ0) of 1.0×10-6 at the 90% confidence level (C.L.). From our B0→ρ0ρ0 measurement and an isospin analysis, we determine the Cabibbo-Kobayashi-Maskawa phase 2 to be 91.7±14.9 degrees. We find excesses in B0→ρ0π+π- and nonresonant B0→4π± with 1.3σ and 2.5σ significance, respectively. The corresponding branching fractions are less than 12.0×10-6 and 19.3×10-6 at the 90% C.L. In addition, we set 90% C.L. upper limits as follows: B(B0→ρ0f0(980))<0.3×10-6, B(B0→f0(980)f0(980))<0.1×10-6, and B(B0→f0(980)π+π-) <3.8×10-6. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.111102

  • Study of intermediate two-body decays in (B)over-bar(0) -> Sigma(c)(2455)(0)(p)over-bar pi(+) Reviewed International coauthorship

    Kim H. O., Kichimi H., et. al. [Belle Collaboration]

    PHYSICS LETTERS B   669 ( 5 )   287 - 293   2008.11( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1016/j.physletb.2008.09.059

  • Evidence for B-0 -> chi(c1)pi(0) at Belle Reviewed International coauthorship

    Kumar R., Singh J. B., et. al. [Belle Collaboration]

    PHYSICAL REVIEW D   78 ( 9 )   2008.11( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.78.091104

  • Study of the suppressed B meson decay B--> DK-, D -> K+pi(-) Reviewed

    Horii Y., Trabelsi K., Yamamoto H., Adachi I., Aihara H., Arinstein K., Aulchenko V., Balagura V., Barberio E., Bedny I., Belous K., Bhardwaj V., Bitenc U., Blyth S., Bozek A., Bracko M., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Cho I.-S., Choi S.-K., Choi Y., Dalseno J., Dash M., Eidelman S., Gabyshev N., Ha H., Haba J., Hara T., Hayasaka K., Hazumi M., Heffernan D., Hoshi Y., Hou W.-S., Hyun H. J., Inami K., Ishikawa A., Ishino H., Itoh R., Iwabuchi M., Iwasaki M., Iwasaki Y., Kah D. H., Kaji H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kuo C. C., Kuroki Y., Kuzmin A., Kwon Y.-J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Lin S.-W., Liu C., Liventsev D., Mandl F., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Nagamine T., Nagasaka Y., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Ozaki H., Pakhlova G., Park C. W., Park H., Park H. K., Peak L. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Schwanda C., Schwartz A. J., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shiu J.-G., Somov A., Stanic S., Staric M., Sumiyoshi T., Suzuki S., Takasaki F., Tamura N., Tanaka M., Teramoto Y., Tsuboyama T., Uehara S., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Vervink K., Wang C. H., Wang M.-Z., Wang P., Wang X. L., Watanabe Y., Wedd R., Won E., Yamashita Y., Yamauchi M., Zhang C. C., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A., Zyukova O.

    PHYSICAL REVIEW D   78 ( 7 )   2008.10( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.78.071901

  • Observation of a near-threshold enhancement in the e+e- →Λc+Λc- Cross section using initial-state radiation Reviewed

    G. Pakhlova, et. al. [Belle Collaboation]

    Physical Review Letters   101 ( 17 )   2008.10( ISSN:00319007

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    We report a measurement of the exclusive e+e-→Λc+Λc- cross section as a function of center-of-mass energy near the Λc+Λc- threshold. A clear peak with a significance of 8.2σ is observed in the Λc+Λc- invariant mass distribution just above threshold. With an assumption of a resonance origin for the observed peak, a mass and width of M=[4634-7+8(stat)-8+5(syst)]MeV/c2 and Γtot=[92- 24+40(stat)-21+10(syst)]MeV are determined. The analysis is based on a study of events with initial-state-radiation photons in a data sample collected with the Belle detector at the Υ(4S) resonance and nearby continuum with an integrated luminosity of 695fb-1 at the KEKB asymmetric-energy e+e- collider. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevLett.101.172001

  • Observation of two resonancelike structures in the pi(+)chi(c1) mass distribution in exclusive (B)overbar(0)-> K-pi(+)chi(c1) decays Reviewed

    Mizuk R., Chistov R., Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Barberio E., Bay A., Bhardwaj V., Bitenc U., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang M. -C., Chang P., Chen A., Chen K. -F., Cheon B. G., Chiang C. -C., Cho I. -S., Choi S. -K., Choi Y., Dalseno J., Danilov M., Drutskoy A., Eidelman S., Epifanov D., Goldenzweig P., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Hoshi Y., Hou W. -S., Hsiung Y. B., Hyun H. J., Iijima T., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kaji H., Kang J. H., Kawasaki T., Kichimi H., Kim H. J., Kim H. O., Kim Y. I., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuzmin A., Kwon Y. -J., Kyeong S. -H., Lange J. S., Lee J. S., Lee M. J., Lin S. -W., Liu C., Liu Y., Liventsev D., Mandl F., McOnie S., Miyabayashi K., Miyata H., Miyazaki Y., Nakano E., Nakao M., Nakazawa H., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H., Park H. K., Peak L. S., Pestotnik R., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Schneider O., Schwartz A. J., Senyo K., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Sumiyoshi T., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Trabelsi K., Uehara S., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Vervink K., Wang C. H., Wang M. -Z., Wang P., Wang X. L., Watanabe Y., Wicht J., Won E., Yabsley B. D., Yamashita Y., Zhang C. C., Zhang Z. P., Zhilich V., Zhulanov V., Zivko T., Zupanc A., Zyukova O.

    PHYSICAL REVIEW D   78 ( 7 )   2008.10( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.78.072004

  • High-statistics study of the τ-→π-π0ντ decay Reviewed

    M. Fujikawa, H. Hayashii, S. Eidelman, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 7 )   2008.10( ISSN:15507998

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    We report a high-statistics measurement of the branching fraction for τ-→π-π0ντ and the invariant mass spectrum of the produced π-π0 system using 72.2fb-1 of data recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching fraction obtained is (25.24±0.01±0.39)%, where the first error is statistical and the second is systematic. The unfolded π-π0 mass spectrum is used to determine resonance parameters for the ρ(770), ρ′(1450), and ρ′′(1700) mesons. We also use this spectrum to estimate the hadronic (2π) contribution to the anomalous magnetic moment of the muon (aμππ). Our result for aμππ integrated over the mass range s=2mπ-1.8GeV/c2 is aμππ=(523.5±1.5(exp)±2.6(Br) ±2.5(isospin))×10-10, where the first error is due to the experimental uncertainties, the second is due to the uncertainties in the branching fractions, and the third is due to the uncertainties in the isospin-violating corrections. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.072006

  • High-statistics measurement of neutral-pion pair production in two-photon collisions Reviewed

    Uehara S., Watanabe Y., Adachi I., Aihara H., Arinstein K., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Belous K., Bhardwaj V., Bitenc U., Bondar A., Bracko M., Browder T. E., Chang M. -C., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Cho I. -S., Choi Y., Dalseno J., Dash M., Drutskoy A., Eidelman S., Epifanov D., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hoshi Y., Hou W. -S., Hyun H. J., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kaji H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim Y. I., Kim Y. J., Korpar S., Krizan P., Krokovny P., Kumar R., Kuzmin A., Kwon Y. -J., Kyeong S. -H., Lange J. S., Lee J. S., Lee S. E., Limosani A., Lin S. -W., Liu C., Liu Y., Liventsev D., Mandl F., McOnie S., Miyabayashi K., Miyazaki Y., Mori T., Nagasaka Y., Nakamura I., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H., Park H. K., Park K. S., Peak L. S., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Senyo K., Sevior M. E., Shapkin M., Shen C. P., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Stanic S., Staric M., Sumiyoshi T., Suzuki S. Y., Taylor G. N., Teramoto Y., Tikhomirov I., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Wang C. H., Wang P., Wang X. L., Wedd R., Won E., Yamashita Y., Yusa Y., Zhang Z. P., Zhilich V., Zhulanov V., Zivko T., Zupanc A., Zyukova O.

    PHYSICAL REVIEW D   78 ( 5 )   2008.09( ISSN:1550-7998

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.78.052004

  • Observation of B±→ψ(2S)π± and search for direct CP violation Reviewed

    V. Bhardwaj, R. Kumar, J. B. Singh, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 5 )   2008.09( ISSN:15507998

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    We report the first observation of B±→ψ(2S)π±, a Cabibbo- and color-suppressed decay. This analysis is based on 657×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. The measured branching fraction is (2.44±0.22±0.20)×10-5 and the charge asymmetry is A=0.022±0.085±0.016. The ratio of the branching fractions B(B±→ψ(2S)π±)/B(B±→ψ(2S)K±)=(3. 99±0.36±0.17)% is also determined. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.051104

  • Measurement of branching fractions, isospin, and CP-violating asymmetries for exclusive b→dγ modes Reviewed

    N. Taniguchi, M. Nakao, S. Nishida, et. al. [Belle Collaboation]

    Physical Review Letters   101 ( 11 )   2008.09( ISSN:00319007

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    We report new measurements of the decays B+→ρ+γ, B0→ρ0γ, and B0→ωγ using a data sample of 657×106 B meson pairs accumulated with the Belle detector at the KEKB e+e- collider. We measure branching fractions B(B+→ρ+γ)=(8.7-2.7-1. 1+2.9+0.9)×10-7, B(B0→ρ0γ)=(7.8-1.6-1.0+1.7+0.9)×10- 7, and B(B0→ωγ)=(4.0-1.7+1.9±1.3)×10-7. We also report the isospin asymmetry Δ(ργ)=-0.48-0.19-0.09+0.21+0.08 and the first measurement of the direct CP-violating asymmetry ACP(B+→ρ +γ)=-0.11±0.32±0.09, where the first and second errors are statistical and systematic, respectively. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevLett.101.111801

  • New search for tau -> mu gamma and tau -> e gamma decays at Belle Reviewed

    Hayasaka K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aulchenko V., Bakich A. M., Barberio E., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Bondar A., Bozek A., Bracko M., Brodzicka J., Chang M. -C., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Gershon T., Go A., Golob B., Ha H., Haba J., Hara K., Hara T., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim S. K., Kim Y. J., Kozakai Y., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee M. J., Lee S. E., Lesiak T., Lin S. -W., Liventsev D., Mandl F., Matsumoto T., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Moloney G. R., Mori T., Nagasaka Y., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park H., Park K. S., Peak L. S., Pestotnik R., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shwartz B., Singh J. B., Sokolov A., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumiyoshi T., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Tsuboyama T., Tsukamoto T., Uehara S., Ueno K., Uglov T., Uno S., Urquijo P., Usov Y., Varner G., Villa S., Vinokurova A., Wang C. C., Wang C. H., Watanabe Y., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A.

    PHYSICS LETTERS B   666 ( 1 )   16 - 22   2008.08( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2008.06.056

  • Measurement of the moments of the photon energy spectrum in B -> X-s gamma decays and determination of |V-cb| and m(b) at Belle Reviewed

    Schwanda C., Urquijo P., Barberio E., Limosani A., Adachi I., Aihara H., Arinstein K., Aushev T., Bahinipati S., Bakich A. M., Balagura V., Bedny I., Belous K., Bitenc U., Bondar A., Bozek A., Brancko M., Chang M. -C., Chen A., Chen W. T., Cheon B. G., Chistov R., Cho I. -S., Choi Y., Dalseno J., Dash M., Drutskoy A., Eidelman S., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou W. -S., Hyun H. J., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kichimi H., Kim H. J., Kim Y. J., Kinoshita K., Korpar S., Kozakai Y., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuroki Y., Kuzmin A., Kwon Y. -J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Liu C., Liventsev D., Mandl F., Matyja A., McOnie S., Medvedeva T., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ohshima T., Okuno S., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Schuemann J., Seidl R., Sekiya A., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shiu J. -G., Shwartz B., Somov A., Stanic S., Staric M., Sumiyoshi T., Takasaki F., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Trabelsi K., Uehara S., Unno Y., Uno S., Varner G., Varvell K. E., Vervink K., Villa S., Wang C. H., Wang P., Watanabe Y., Wedd R., Won E., Yabsley B. D., Yamamoto H., Yamashita Y., Zhang Z. P., Zupanc A.

    PHYSICAL REVIEW D   78 ( 3 )   2008.08( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.78.032016

  • Measurement of masses of the Xi(c)(2645) and Xi(c)(2815) baryons and observation of Xi(c)(2980)->Xi(c)(2645)pi Reviewed

    Lesiak T., Adachi I., Aihara H., Arinstein K., Bakich A. M., Balagura V., Barberio E., Bedny I., Belous K., Bhardwaj V., Bitenc U., Blyth S., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Cho I. -S., Choi S. -K., Choi Y., Dalseno J., Dash M., Eidelman S., Gabyshev N., Golob B., Ha H., Haba J., Hayasaka K., Hazumi M., Heffernan D., Hoshi Y., Hou W. -S., Hyun H. J., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kaji H., Kang J. H., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim S. K., Kim Y. J., Korpar S., Krizan P., Krokovny P., Kuo C. C., Kwon Y. -J., Lange S., Lee J. S., Lee M. J., Lee S. E., Li J., Lin S. -W., Liu C., Liventsev D., Mandl F., McOnie S., Medvedeva T., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Nagasaka Y., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Nozaki T., Ogawa S., Ohshima T., Okuno S., Ozaki H., Pakhlova G., Palka H., Park C. W., Park H. K., Peak L. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shiu J. -G., Shwartz B., Sokolov A., Stanic S., Staric M., Sumiyoshi T., Takasaki F., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Trabelsi K., Tsuboyama T., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Varner G., Varvell K. E., Vervink K., Wang C. C., Wang C. H., Wang M. -Z., Wang P., Wang X. L., Watanabe Y., Wedd R., Won E., Yabsley B. D., Yamamoto H., Yamashita Y., Yamauchi M., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A., Zyukova O.

    PHYSICS LETTERS B   665 ( 1 )   9 - 15   2008.07( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physletb.2008.05.055

  • Search for B+→D*+π0 decay Reviewed

    M. Iwabuchi, M. Nakao, et. al. [Belle Collaboation]

    Physical Review Letters   101 ( 4 )   2008.07( ISSN:00319007

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    We report on a search for the doubly Cabibbo suppressed decay B+→D*+π0, based on a data sample of 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no significant signal and set an upper limit of B(B+→D*+π0)<3.6×10-6 at the 90% confidence level. This limit can be used to constrain the ratio between suppressed and favored B→D*π decay amplitudes, r<0.051, at the 90% confidence level. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevLett.101.041601

  • Search for B→πℓ+ℓ- decays at Belle Reviewed

    J. T. Wei, K. F. Chen, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 1 )   2008.07( ISSN:15507998

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    We present a search for the decays B+→π+ℓ+ℓ- and B0→π0ℓ+ℓ-, where ℓ+ℓ- is either a μ+μ- or e+e- pair, with a data sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider. Signal events are reconstructed from a charged or a neutral pion candidate and a pair of oppositely charged electrons or muons. No significant signal is observed and we set an upper limit on the isospin-averaged branching fraction B(B→πℓ+ℓ-)<6.2×10-8 at the 90% confidence level. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.011101

  • Search for B0→J/ψ decays Reviewed

    Y. Liu, K. Trabelsi, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 1 )   2008.07( ISSN:15507998

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    We report a search for the decay B0→J/ψ, using a sample of 657×106 BB̄ pairs collected with the Belle detector at the Υ(4S) resonance. No statistically significant signal is found and an upper limit for the branching fraction is determined to be B(B0→J/ψ)<9.4×10-7 at 90% confidence level. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.011106

  • Observation of B-0 -> p(p)over-barK*(0) with a large K*(0) polarization Reviewed

    Chen J. -H., Wang M. -Z., Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Belous K., Bitenc U., Bondar A., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Cho I. -S., Choi S. -K., Choi Y., Dalseno J., Dash M., Drutskoy A., Eidelman S., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou W. -S., Hsiung Y. B., Hyun H. J., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Joshi N. J., Kah D. H., Kaji H., Kapusta P., Katayama N., Kawasaki T., Kichimi H., Kim H. J., Kim S. K., Kim Y. J., Kinoshita K., Krokovny P., Kumar R., Kuo C. C., Kwon Y. -J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Limosani A., Liu C., Liventsev D., Mandl F., Matyja A., McOnie S., Medvedeva T., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Rozanska M., Sahoo H., Sakai Y., Schneider O., Senyo K., Sevior M. E., Shapkin M., Shen C. P., Shibuya H., Shiu J. -G., Singh J. B., Somov A., Stanic S., Staric M., Sumiyoshi T., Takasaki F., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Trabelsi K., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Vervink K., Villa S., Vinokurova A., Wang C. C., Wang C. H., Wang P., Wang X. L., Watanabe Y., Wedd R., Won E., Yamamoto H., Yamashita Y., Zhang C. C., Zhang Z. P., Zhulanov V., Zupanc A.

    PHYSICAL REVIEW LETTERS   100 ( 25 )   2008.06( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.100.251801

  • Measurement of B(D-s(+)->mu(+)nu(mu)) Reviewed

    Widhalm L., Adachi I., Aihara H., Aushev T., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Bhardwaj V., Bitenc U., Blyth S., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Cho I. -S., Choi Y., Dalseno J., Dash M., Drutskoy A., Eidelman S., Goldenzweig P., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou W. -S., Hsiung Y. B., Hyun H. J., Iijima T., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuroki Y., Kuzmin A., Kwon Y. -J., Lee J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Lin S. -W., Liu C., Liventsev D., Mandl F., Matyja A., McOnie S., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ogawa S., Ohshima T., Okuno S., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H., Park K. S., Peak L. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Seidl R., Sekiya A., Senyo K., Shapkin M., Shibuya H., Shiu J. -G., Singh J. B., Somov A., Stanic S., Staric M., Sumiyoshi T., Suzuki S. Y., Takasaki F., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Trabelsi K., Uehara S., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Vervink K., Wang C. H., Wang M. -Z., Wang P., Watanabe Y., Wedd R., Won E., Yabsley B. D., Yamamoto H., Yamashita Y., Zhang Z. P., Zhilich V., Zupanc A., Zyukova O.

    PHYSICAL REVIEW LETTERS   100 ( 24 )   2008.06( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.100.241801

  • Search for lepton-flavor-violatingy tau -> lV(0) decays at Belle Reviewed

    Nishio Y., Inami K., Ohshim T., Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., Aziz T., Bakich A. M., Balagura V., Barberio E., Bedny I., Beious K., Bitenc U., Blyth S., Bondar A., Bracko M., Browder T. E., Chen A., Chen W. T., Cheon B. G., Cho I. -S., Choi Y., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Golob B., Ha H., Haba J., Hara K., Hayasaka K., Hayashii H., Hazumi M., Horii Y., Hoshi Y., Hou W. -S., Hsiung Y. B., Iijima T., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kaji H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim Y. J., Korpar S., Kozakai Y., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuroki Y., Kuzmin A., Kwon Y. -J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Liu Y., Liventsev D., Mandl F., McOnie S., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Nakazawa H., Nishida S., Nitoh O., Ogawa S., Okuno S., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Pestotnik R., Piilonen L. E., Poluektov A., Sakai Y., Schneider O., Senyo K., Sevior M. E., Shapkin M., Shebalin V., Shibuya H., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Sumiyoshi T., Takasaki F., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Usov Y., Varner G., Villa S., Vinokurova A., Wang C. H., Wang P., Wang X. L., Watanabe Y., Won E., Yamashita Y., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A., Zyukova O.

    PHYSICS LETTERS B   664 ( 1-2 )   35 - 40   2008.06( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2008.05.012

  • Improved search for D0-D̄0 mixing using semileptonic decays at Belle Reviewed

    U. Bitenc, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 11 )   2008.06( ISSN:15507998

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    A search for mixing in the neutral D meson system has been performed using semileptonic D0→K(*)-e+ν and D0→K(*)-μ+ν decays. Neutral D mesons from D*+→D0πs+ decays are used and the flavor at production is tagged by the charge of the slow pion. The measurement is performed using 492fb-1 of data recorded by the Belle detector. From the yield of right-sign and wrong-sign decays arising from nonmixed and mixed events, respectively, we measure the ratio of the time-integrated mixing rate to the unmixed rate to be RM=(1.3±2.2±2.0)×10-4. This corresponds to an upper limit of RM<6.1×10-4 at the 90% C.L. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.112003

  • Production of new charmoniumlike states in e(+)e(-)-> J/psi D(()*())(D)over-bar(()*()) at root s approximate to 10.6 GeV Reviewed

    Pakhlov P., Adachi I., Aihara H., Arinstein K., Aushev T., Aziz T., Bakich A. M., Balagura V., Barberio E., Bedny I., Belous K., Bhardwaj V., Bitenc U., Bondar A., Bozek A., Bracko M., Browder T. E., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Golob B., Ha H., Hayasaka K., Hazumi M., Heffernan D., Hoshi Y., Hou W. -S., Hsiung Y. B., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kwon Y. -J., Lange J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. -W., Liu Y., Liventsev D., Mandl F., Matyja A., Medvedeva T., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlova G., Palka H., Park C. W., Peak L. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shen C. P., Shibuya H., Shiu J. -G., Singh J. B., Somov A., Stanic S., Staric M., Sumiyoshi T., Suzuki S., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Vervink K., Wang C. H., Wang P., Wang X. L., Watanabe Y., Won E., Yabsley B. D., Yamashita Y., Yamauchi M., Yuan C. Z., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A., Zyukova O.

    PHYSICAL REVIEW LETTERS   100 ( 20 )   2008.05( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.100.202001

  • Search for resonant B± → K± h → K± γ γ decays at Belle Reviewed

    J. Wicht, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   662   323 - 329   2008.05( ISSN:03702693

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    We report measurements and searches for resonant B± → K± h → K± γ γ decays where h is a η, η′, ηc, ηc (2 S), χc 0, χc 2, J / ψ meson or the X (3872) particle. The results are based on a data sample containing 535 million B over(B, ̄) pairs collected with the Belle detector at the KEKB e+ e- asymmetric-energy collider operating at the Υ{hooked} (4 S) resonance. Signals are observed in the modes with η and η′, and we obtain evidence for a signal in the mode with ηc. We measure B (B± → K± η → K± γ γ) = (0.87-0.15+0.16 (stat)-0.07+0.10 (syst)) × 10-6, B (B± → K± η′ → K± γ γ) = (1.40-0.15+0.16 (stat)-0.12+0.15 (syst)) × 10-6 and B (B± → K± ηc → K± γ γ) = (0.22-0.07+0.09 (stat)-0.02+0.04 (syst)) × 10-6. We set upper limits on the branching fractions of the other modes. © 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.03.029

  • Measurements of time-dependent CP violation in B0→ψ(2S)KS0 decays Reviewed

    H. Sahoo, T. E. Browder, K. Trabelsi, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 9 )   2008.05( ISSN:15507998

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    We report improved measurements of time-dependent CP violation parameters for B0(B̄0)→ψ(2S)KS0. This analysis is based on a data sample of 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We fully reconstruct one neutral B meson in the ψ(2S)KS0 CP-eigenstate decay channel, and the flavor of the accompanying B meson is identified to be either B0 or B̄0 from its decay products. CP violation parameters are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays: Sψ(2S)KS0=+0.72±0.09(stat)±0.03(syst), Aψ(2S)KS0=+0.04±0.07(stat)±0.05(syst). These results are in agreement with results from measurements of B0→J/ψK0. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.091103

  • Measurement of the branching fraction and charge asymmetry of the decay B+→D+D̄0 and search for B0→D0D̄0 Reviewed

    I. Adachi, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 9 )   2008.05( ISSN:15507998

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    We report an improved measurement of the B+→D+D̄0 and B0→D0D̄0 decays based on 657×106 BB̄ events collected with the Belle detector at KEKB. We measure the branching fraction and charge asymmetry for the B+→D+D̄0 decay: B(B+→D+D̄0)=(3. 85±0.31±0.38)×10-4 and ACP(B+→D+D̄0)=0. 00±0.08±0.02, where the first error is statistical and the second is systematic. We also set the upper limit for the B0→D0D̄0 decay: B(B0→D0D̄0)<0.43×10-4 at 90% CL. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.091101

  • Study of B→D**lν with full reconstruction tagging Reviewed

    D. Liventsev, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 9 )   2008.05( ISSN:15507998

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    We report a study of semileptonic B decays to P-wave D** mesons. Semileptonic decay to a D2* meson is observed for the first time and its product branching ratio is measured to be B(B+→D̄2*0 +ν)×B(D̄2*0→D-π+)=0.22±0.03(stat.)±0. 04(syst.)%. The result is obtained using fully reconstructed B tags from a data sample that contains 657×106BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.091503

  • Measurement of the ratio B(D-0 ->pi(+)pi(-)pi(0))/B(D-0 -> K-pi(+)pi(0)) and the time-integrated CP asymmetry in D-0 ->pi(+)pi(-)pi(0) Reviewed

    Arinstein K., Adachi I., Aihara H., Aulchenko V., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Belous K., Bhardwaj V., Bitenc U., Blyth S., Bondar A., Bozek A., Bracko M., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Cho I. -S., Choi Y., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Goldenzweig P., Golob B., Ha H., Haba J., Hara K., Hayasaka K., Hayashii H., Hazumi M., Hoshi Y., Hou W. -S., Iijima T., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kaji H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Kozakai Y., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuroki Y., Kuzmin A., Kwon Y. -J., Lange J. S., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. -W., Liu C., Liu Y., Liventsev D., Mandl F., McOnie S., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Park K. S., Pestotnik R., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Schneider O., Schfimann J., Schwanda C., Schwartz A. J., Senyo K., Sevior M. E., Shapkin M., Shebalin V., Shibuya H., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Sumiyoshi T., Suzuki S. Y., Takasaki F., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Usov Y., Varner G., Vervink K., Villa S., Vinokurova A., Wang C. H., Wang M. -Z., Wang P., Wang X. L., Watanabe Y., Won E., Yabsley B. D., Yamamoto H., Yamashita Y., Zhang C. C., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A., Zyukova O.

    PHYSICS LETTERS B   662 ( 2 )   102 - 110   2008.04( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2008.02.054

  • Improved measurement of time-dependent CP violation in B0→J/ψπ0 decays Reviewed

    S. E. Lee, K. Miyabayashi, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 7 )   2008.04( ISSN:15507998

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    We report improved measurements of time-dependent CP violation parameters for B0(B̄0)→J/ψπ0 decay. This analysis is based on 535×106 BB̄ pairs accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters SJ/ψπ0=-0.65±0.21(stat) ±0.05(syst)andAJ/ψπ0=+0.08±0.16(stat)±0.05(syst), which are consistent with standard model expectations. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.071101

  • Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays Reviewed

    S. K. Choi, S. L. Olsen, et. al. [Belle Collaboation]

    Physical Review Letters   100 ( 14 )   2008.04( ISSN:00319007

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    A distinct peak is observed in the π±ψ′ invariant mass distribution near 4.43 GeV in B→Kπ±ψ′ decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433±4(stat)±2(syst)MeV and Γ=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B0→K Z±(4430))×B(Z±(4430)→π±ψ′)=(4. 1±1.0(stat)±1.4(syst))×10-5, where Z±(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5σ. These results are obtained from a 605fb-1 data sample that contains 657×106 BB̄ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevLett.100.142001

  • Measurement of CP asymmetries and branching fractions in a time-dependent Dalitz analysis of B0→(ρπ)0 and a constraint on the quark mixing angle 2 Reviewed

    A. Kusaka, C. C. Wang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 7 )   2008.04( ISSN:15507998

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    We present the results of a time-dependent Dalitz plot analysis of B0→π+π-π0 decays based on a 414fb-1 data sample that contains 449×106BB̄ pairs. The data were collected on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the quark mixing angle 2, 68°< 2<95° at the 68.3% confidence level for the 2 solution consistent with the standard model. A large standard-model-disfavored region also remains. The branching fractions for the decay processes B0→ρ±(770)π and B0→ρ0(770)π0 are measured to be (22.6±1.1[stat]±4.4[syst])×10-6 and (3.0±0.5[stat] ±0.7[syst])×10-6, respectively. These are the first branching fraction measurements of the process B0→ρ(770)π with the lowest resonance ρ(770) explicitly separated from the radial excitations. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.072001

  • Observation of anomalous Y(1S)pi(+)pi(-) and Y(2S)pi(+)pi(-) production near the Y(5S) resonance Reviewed

    Chen K. -F., Hou W. -S., Shapkin M., Sokolov A., Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Bay A., Belous K., Bhardwaj V., Bitenc U., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen W. T., Chistov R., Choi Y., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Gabyshev N., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hsiung Y. B., Hyun H. J., Iijima T., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. O., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kwon Y. -J., Lange J. S., Lee J. S., Lee M. J., Lesiak T., Limosani A., Lin S. -W., Liu Y., Liventsev D., Mandl F., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ostrowicz W., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H., Park K. S., Pestotnik R., Piilonen L. E., Sakai Y., Schneider O., Schuemann J., Schwanda C., Schwartz A. J., Senyo K., Sevior M. E., Shen C. P., Shibuya H., Shiu J. -G., Shwartz B., Somov A., Stanic S., Staric M., Sumiyoshi T., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Trabelsi K., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Ushiroda Y., Usov Y., Varner G., Vervink K., Villa S., Wang C. C., Wang C. H., Wang M. -Z., Wang P., Wang X. L., Watanabe Y., Wedd R., Wicht J., Won E., Yabsley B. D., Yamashita Y., Yamauchi M., Yuan C. Z., Yusa Y., Zhang C. C., Zhang Z. P., Zupanc A.

    PHYSICAL REVIEW LETTERS   100 ( 11 )   2008.03( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.100.112001

  • Difference in direct charge-parity violation between charged and neutral B meson decays Reviewed

    Lin S. -W., Unno Y., Hou W. -S., Chang P., Adachi I., Aihara H., Akai K., Arinstein K., Aulchenko V., Aushev T., Aziz T., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Bitenc U., Bondar A., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chiang C. -C., Chistov R., Cho I. -S., Choi S. -K., Choi Y., Choi Y. K., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Fujikawa M., Furukawa K., Gabyshev N., Goldenzweig P., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hsiung Y. B., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwabuchi M., Iwasaki M., Iwasaki Y., Kah D. H., Kaji H., Kataoka S. U., Kawai H., Kawasaki T., Kibayashi A., Kichimi H., Kikutani E., Kim H. J., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Kozakai Y., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee M. J., Lee S. E., Lesiak T., Li J., Liu Y., Liventsev D., Mandl F., Marlow D., McOnie S., Medvedeva T., Mimashi T., Mitaroff W., Miyabayashi K., Miyake H., Miyazaki Y., Mizuk R., Mori T., Nakamura T. T., Nakano E., Nakao M., Nakazawa H., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ogawa Y., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlova G., Park C. W., Park H., Peak L. S., Pestotnik R., Peters M., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Schneider O., Schuemann J., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shen C. P., Shibuya H., Shidara T., Shinomiya S., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Sumisawa K., Sumiyoshi T., Suzuki S., Tajima O., Takasaki F., Tamura N., Tanaka M., Tawada M., Taylor G. N., Teramoto Y., Tikhomirov I., Trabelsi K., Uehara S., Ueno K., Uglov T., Uno S., Urquijo P., Ushiroda Y., Usov Y., Varner G., Varvell K. E., Vervink K., Villa S., Wang C. C., Wang C. H., Wang M. -Z., Watanabe Y., Wedd R., Wicht J., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Yoshida M., Yuan C. Z., Yusa Y., Zhang C. C., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A.

    NATURE   452 ( 7185 )   332 - U3   2008.03( ISSN:0028-0836

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    DOI: 10.1038/nature06827

  • Search for B̄0→Λc+Λ̄c- decay at Belle Reviewed

    Y. Uchida, H. Ozaki, H. Kichimi, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 5 )   2008.03( ISSN:15507998

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    We search for the doubly charmed baryonic decay B̄0→Λ c+Λ̄c-, in a data sample of 520×106 BB̄ events accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no significant signal and set an upper limit of B(B̄0→Λc+Λ̄c-)<6.2×10-5 at 90% confidence level. The result is significantly below a naive extrapolation from B(B-→Ξc0Λ̄c-) assuming a simple Cabibbo-suppression factor of |Vcd/Vcs|2. The small branching fraction may be attributed to a suppression due to the large momentum of the baryonic decay products, which has been observed in other charmed baryonic two-body B decays. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.051101

  • Observation of a new DsJ meson in B+→D̄0D0K+ decays Reviewed

    J. Brodzicka, H. Palka, et. al. [Belle Collaboation]

    Physical Review Letters   100 ( 9 )   2008.03( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    We report the observation of a new DsJ meson produced in B+→D̄0DsJ→D̄0D0K+. This state has a mass of M=2708±9-10+11MeV/c2, a width Γ=108±23-31+36MeV/c2 and a 1- spin-parity. The statistical significance of this observation is 8.4σ. The results are based on an analysis of 449×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevLett.100.092001

  • Measurement of time-dependent CP-violating parameters in B0→KS0KS0 decays Reviewed

    Y. Nakahama, K. Sumisawa, et. al. [Belle Collaboation]

    Physical Review Letters   100 ( 12 )   2008.03( ISSN:00319007

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    We report a measurement of the CP-violating parameters in B0→KS0KS0 decays based on a data sample of 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. In this Letter, one neutral B meson is fully reconstructed in the B0→KS0KS0 decay mode, and the flavor of the accompanying B meson is identified by its decay products. The CP-violating parameters are measured from the asymmetry in the distributions of the proper-time interval between the two B decays: SKS0KS0=-0.38-0.77+0.69(stat)±0.09(syst) and AKS0KS0=-0.38±0.38(stat)±0.05(syst). © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevLett.100.121601

  • Observation of the psi(4415) -> D(D)over-bar(2)(*)(2460) decay using initial-state radiation Reviewed

    Pakhlova G., Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Barberio E., Bedny I., Belous K., Bitenc U., Bondar A., Bracko M., Brodzicka J., Browder T. E., Chen A., Chen W. T., Cheon B. G., Chiang C. -C., Chistov R., Cho I. -S., Choi Y., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Golob B., Ha H., Haba J., Hayasaka K., Hazumi M., Heffernan D., Hoshi Y., Hou W. -S., Hsiung Y. B., Hyun H. J., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kang J. H., Kawasaki T., Kibayashi A., Kichimi H., Kim H. J., Kim H. O., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lange J. S., Lee M. J., Lee S. E., Lesiak T., Lin S. -W., Liventsev D., Mandl F., Marlow D., McOnie S., Medvedeva T., Miyake H., Mizuk R., Mohapatra D., Moloney G. R., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Park H., Park K. S., Peak L. S., Pestotnik R., Piilonen L. E., Poluektov A., Sakai Y., Schneider O., Schwanda C., Senyo K., Shapkin M., Shen C. P., Shibuya H., Shiu J. -G., Shwartz B., Singh J. B., Somov A., Stanic S., Sumiyoshi T., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Usov Y., Varner G., Vinokurova A., Wang C. H., Wang M. -Z., Wang P., Wang X. L., Watanabe Y., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Yuan C. Z., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A.

    PHYSICAL REVIEW LETTERS   100 ( 6 )   2008.02( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.100.062001

  • Search for lepton flavor violating τ decays into three leptons Reviewed

    Y. Miyazaki, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   660 ( 3 )   154 - 160   2008.02( ISSN:03702693

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    We search for lepton flavor violating τ decays into three leptons (electron or muon) using 535 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is observed, and we set 90% confidence level upper limits on the branching fractions of (2.0 - 4.1) × 10-8. These results improve upon our previously published upper limits by factors of 4.9 to 10. © 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.12.046

  • Observation of Ds1(2536)+→D+π-K+ and angular decomposition of Ds1(2536)+→D*+KS0 Reviewed

    V. Balagura, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   77 ( 3 )   2008.02( ISSN:15507998

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    Using 462fb-1 of e+e- annihilation data recorded by the Belle detector, we report the first observation of the decay Ds1(2536)+→D+π-K+. The ratio of branching fractions B(Ds1(2536)+→D+π-K+)B(Ds1(2536) +→D*+K0) is measured to be (3.27±0.18±0.37)%. We also study the angular distributions in the Ds1(2536)+→D*+KS0 decay and measure the ratio of D- and S-wave amplitudes. The S-wave dominates, with a partial width of ΓS/Γtotal=0.72±0.05±0.01. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.032001

  • Study of charmonia in four-meson final states produced in two-photon collisions Reviewed

    Uehara S., Adachi I., Aihara H., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Barberio E., Bay A., Belous K., Bitenc U., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Cho I. -S., Choi Y., Choi Y. K., Dalseno J., Dash M., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Gokhroo G., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou W. -S., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kaji H., Kang J. H., Kawai H., Kawasaki T., Kichimi H., Kim H. O., Kim S. K., Kim Y. J., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Limosani A., Lin S. -W., Liu Y., Liventsev D., Mandl F., Matsumoto T., Matyja A., McOnie S., Medvedeva T., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumiyoshi T., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Tsuboyama T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Vervink K., Villa S., Vinokurova A., Wang C. H., Wang P., Watanabe Y., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yuan C. Z., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A.

    EUROPEAN PHYSICAL JOURNAL C   53 ( 1 )   1 - 14   2008.01( ISSN:1434-6044

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    DOI: 10.1140/epjc/s10052-007-0451-z

  • Study of the decay mechanism for B+ → p over(p, ̄) K+ and B+ → p over(p, ̄) π+ Reviewed

    J. T. Wei, M. Z. Wang, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   659 ( 1-2 )   80 - 86   2008.01( ISSN:03702693

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    We study the characteristics of the low mass p over(p, ̄) enhancements near threshold in the three-body decays B+ → p over(p, ̄) K+ and B+ → p over(p, ̄) π+. We observe that the proton polar angle distributions in the p over(p, ̄) helicity frame in the two decays have the opposite polarity, and measure the forward-backward asymmetries as a function of the p over(p, ̄) mass for the p over(p, ̄) K+ mode. We also search for the intermediate two-body decays, B+ → over(p, ̄) Δ+ + and B+ → p over(Δ, ̄)0, and set upper limits on their branching fractions. These results are obtained from a 414   fb-1 data sample that contains 449 × 106 B over(B, ̄) events collected near the Υ{hooked} (4 S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider. © 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.11.063

  • R&amp;D status of readout system for a large photo cathode HAPD Reviewed

    T. Abe, H. Aihara, M. Iwasaki, H. Miyatake, T. Uchida, M. Tanaka, Y. Kawai, H. Kyushima, M. Suyama, Y. Higashi, T. Mizukami, S. Nakano

    IEEE Nuclear Science Symposium Conference Record   3   2373 - 2376   2007.12( ISSN:10957863

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    Publishing type:Research paper (scientific journal)  

    We develop a readout system dedicated for a Hybrid Avalanche Photo-Detector (HAPD). We employ a waveform sampling and digital signal processing (DSP) technique for the system. We fabricate the first prototype of the system. The system is composed of an analog memory cell (AMC) as the waveform sampler and FINENET with field programmable gate arrays (FPGA) to give low power consumption, high resolution, flexible DSP environment and fast output data transfer. A 64-cell AMC is developed and attained a fast sampling speed of 1GHz with the low power consumption of ∼72mW. FINENET works with online DSP functionality and achieved the data transfer rate to ∼1Gbps with SiTCP. We report the performance of the system with HAPD. © 2007 IEEE.

    DOI: 10.1109/NSSMIC.2007.4436621

  • Measurement of B → D<inf>s</inf>Kπ branching ratios Reviewed

    K. Abe, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We report a measurement of the exclusive B+ meson decay to the final state D-s K+π+ using 520 × 106B ̄B pairs collected near the γ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. Using the D-S → Ø- decay mode to reconstruct D- s mesons, we obtain the branching fraction B(B+ → D-s K+π+) = (1.77+0.12-0.12(stat)±0.16(syst) ±0.23(B))×10-4. We also present preliminary results of a study of the two-body DsK, Dsπ and Kπ subsystems observed in this final state.

  • Observation of a resonance-like structure in the π ±ψ' mass distribution in exclusive B → Kπ±ψ' decays Reviewed

    S. K. Choi, S. L. Olsen, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    Publishing type:Research paper (international conference proceedings)  

    A distinct peak is observed in the π±ψ' invariant mass distribution near 4.43 GeV in B → Kπ±ψ' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M = 4433 ± 4 (stat) ± 2 (syst) MeV and F = 45+18 -13 (stat)+30-13 (syst) MeV. The product branching fraction is determined to be B(B0 → K±Z± (4430)) × B(Z±(4430) → π±ψ') = (4.1 ± 1.0(stat) ± 1.4(syst)) × 10-5, where Z±(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5σ. These results are obtained from a 605 fb-1 data sample that contains 657 million B ̄B pairs collected near the γ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider.

  • Measurements of time-dependent CP violation in B0 → (2S)K0<inf>S</inf> decays Reviewed

    H. Sahoo, T. E. Browder, K. Trabelsi, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We report improved measurements of time-dependent CP violation parameters for B0 (B0) → (2S)K0S . This analysis is based on a data sample of 657×106 BB pairs collected at the γ(4S) res- onance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We fully reconstruct one neutral B meson in the (2S)K0 S CP-eigenstate decay channel, and the flavor of the accompa- nying B meson is identified to be either B0 or B0 from its decay products. CP violation parameters are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays: S (2S)K0 S = +0.72 ± 0.09(stat) ± 0.03(syst), A (2S)K0S = +0.04 ± 0.07(stat) ± 0.05(syst). These results are in agreement with results from measurements of B0 → J/ ψ K0.

  • Measurements of CP violation parameters in B0 → K 0<inf>S</inf> π0π0 and B0 → K0<inf>S</inf> K0<inf>S</inf> decays Reviewed

    K. Abe, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    Publishing type:Research paper (scientific journal)  

    We present a measurement of the CP violation parameters in B0 → K0 S π0π0 and B0 → K0S K0S decays using a data sample containing 657 ×106 BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider operating at the γ(4S) resonance. We measure SK0 Sπ0π0 = +0.43 ± 0.49 ± 0.09, AK0 Sπ0π0 = -0.17 ± 0.24 ± 0.06, SK0 SK0 S = -0.38 ± 0.77 ± 0.08 and, AK0 SK0S = -0.38 ± 0.38 ± 0.05, where the first and second errors are statistical and systematic, respectively.

  • Measurement of the inclusive B0<inf>s</inf>→ X+ℓ-ν semileptonic decay branching fraction Reviewed

    K. Abe, et. al. [Belle Collaboration]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    Inclusive semileptonic B0s → X+ℓ-ν decays are studied for the first time using a 23.6 fb-1 data sample collected on the (5S) resonance with the Belle detector at the KEKB asym-metric energy e +e- collider. These decays are identified by the means of a lepton accompa- nied by a same-sign D+s meson originating from the other B0s in the event. The semileptonic branching fractions are measured in the electron and muon channels to be B(B0 s → X+e -ν) =(10.9 ± 1.0 ± 0.9)% and B(B0s → X+μ-ν) = (9.2 ± 1.0 ± 0.8)%, respectively. Assuming an equalelectron and muon production rate in B 0s decays, a combined fit yields an average leptonic branch- ing fraction B(B0s → X+ℓ-ν) = (10.2 ± 0.8 ± 0.9)%.

  • Search for lepton flavor violating τ → ℓv 0 decays at Belle Reviewed

    K. Abe, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We have searched for neutrinoless τ lepton decays into ℓ and V 0, where ℓ stands for an electron or muon, and V 0 for a vector meson (φ, ω, K*0 or ̄K*0), using 543 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No excess of signal events over the expected background is observed, and we set upper limits on the branching fractions in the range (0.7- 1.8) ×10-7 at the 90% confidence level. These upper limits include the first results for ℓω as well as new limits that are 3.6 - 9.6 times more restrictive than our previous results for ℓφ, ℓKπ and ℓ ̄K *0.

  • Search for lepton flavor violating τ decays into three leptons Reviewed

    K. Abe, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    Publishing type:Research paper (international conference proceedings)  

    We search for lepton-flavor-violating τ decays into three leptons (electron or muon) using 535 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No evidence for these decays is observed and we set 90% confidence level upper limits on the branching fractions between 2.0 × 10-8 and 4.1 × 10 -8. These results improve the best previously published upper limits by factors from 4.9 to 7.0.

  • Search for B̄0 → Λ +<inf>c</inf>Λ ̄̄<inf>c</inf>decay at Belle Reviewed

    K. Abe, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We search for the doubly charmed baryonic decay B̄0 → Λ +cΛ ̄̄cin a data sample of 520 × 106 B ̄B events accumulated at the γ(4S) resonance with the Belle detector at the KEKB asymmetricenergy e+e- collider. We find no significant signal and set an upper limit of B B̄0 → Λ +cΛ ̄̄c) 6.2 × 10-5 at 90% confidence level. The result is significantly below a naive extrapolation fromB(B̄→ Ε0c̄ Λc ) assuming a simple Cabibbo-suppression factor of |Vcd/Vcs|2. The small branching fraction could be attributed to a suppression due to the large momentum of the baryonic decay products, which has been observed in other charmed baryonic two-body B decays.

  • Search for B0 → ρ0ρ0 and non-resonant B0 → 4π Reviewed

    K. Abe, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We search for the decay B0 → ρ0ρ0 and other possible charmless modes with a π+ π- π+ π- final state, including B0 → ρ0f0(980), B0 → f0(980)f0(980), B0 → f0(980)π π, B0 → ρ0π π and non-resonant B0 → 4π. These results are obtained from a data sample containing 520 × 106 BB pairs collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a branching fraction of (0.9 ± 0.4+0.3 -0.4) × 10-6, or B(B 0 → ρ0ρ0) < 1.6 × 10-6 at the 90% confidence level. The significance including systematic uncertainties is 1.8σ. These values correspond to the final state being longitudinally polarized. We also measure the branching fraction of non-resonant B0 → 4π decay to be (10.2 ± 4.7+2.3 -1.5) × 10-6 with 2.1σ significance, and set the 90% confidence level upper limit B(B0 → 4π) < 17.3 × 10-6. For the other related decays, B0 → ρ0f0(980), B0 → f0(980)f0(980), B0 → f0(980)ρ and B0 → ρ0π π, no significant signals are observed and upper limits on the branching fractions are set.

  • Production of new charmonium-like states in e+e -→J/Ψ D(-*)D(-*) at √s ≈ 10.6GeV Reviewed

    I. Adachi, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We present a study of the X(3940) state in the process e+e - → J/ Ψ D*)D. The X(3940) mass and width are measured to be (3942 +7-6±6)MeV/c2 and F = (37 +26 -15 ±8)MeV. In the process e+e- → J/ Ψ D*) +D*)- we have observed another charmonium-like state, which we denote as X(4160), in the spectrum of invariant masses of D*) +D*)- combinations. The X(4160) parameters are M =(4156 +25-20±15)MeV/c2 and F = (139 +111- 61±21)MeV. The analysis is based on a data sample with an integrated luminosity of 693 fb-1 recorded near the γ(4S) resonance with the Belle detector at the KEKB e +e- asymmetric-energy collider.

  • Precise measurement of hadronic τ-decays in modes with η mesons Reviewed

    K. Abe, et. al. [Belle Collaboration]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We have measured branching fractions of hadronic τdecays involving an η meson using 485 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the following branching fractions: B(τ - → K-ην) = (1.62 ± 0.05 ± 0.09) × 10-4, B(τ - → K-η0π=ηντ ) = (4.7 ± 1.1 ± 0.4) × 10-5, B(τ - → π-π0ηντ ) = (1.39 ± 0.03 ± 0.07) × 10-3, and B(τ - → K-ην7tau; ) = (1.13 ±0.19 ± 0.07) ×10-4 improving the accuracy compared to the best previous measurements by factors of six, eight, four and four, respectively.

  • Observation of Ψ (4415) → DD*<inf>2</inf> (2460) decay using initial-state radiation Reviewed

    G. Pakhlova, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We report measurements of the exclusive cross section for e +e- → D0D-*+ over the centerof- mass energy range 4.0, GeV to 5.0GeV with initial-state radiation and the first observation of the decay (4415) → D0D-*+. From a study of the resonant substructure inΨ (4415) decay we conclude that the (4415) → D0D-π+ decay is dominated by (4415) → DD- * (2460). We obtain B( (4415) → D0D-*+ non-resonant)/B( (4415) → DD-* 2(2460) → D0D-π+) < 0.22 at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 fb-1.

  • Measurement of B+ → D+ ̄d0 branching fraction and charge asymmetry and search for B0 → ̄d 0D 0 Reviewed

    K. Abe, et. al. [Belle Collaboation]

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007.12

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    We report an improved measurement of the B+ → D+ ̄D0 and B0 → D0 ̄D0 decays based on 656.7 × 106 B ̄B events collected with the Belle detector at KEKB. We measure the branching fraction and charge asymmetry for the B+ → D+ ̄D0 decay: B(B+ → D+ ̄D0) = (3.85±0.31±0.38) × 10-4 and ACP (B+ → D+ ̄D0) = 0.00±0. 08±0.02, where the first error is statistical and the second is systematical. We also set the upper limit for the B0 → ̄D 0D0 decay: B(B0 → ̄D0D0) < 0.42×10-4 at 90% CL.

  • Search for B -> h((*))nu(nu)over-bar decays at Belle Reviewed

    Chen K. -F., Adachi I., Aihara H., Aulchenko V., Aushev T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Bay A., Belous K., Bitenc U., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang M. -C., Chang P., Chao Y., Chen A., Cheon B. G., Chiang C. -C., Cho I. -S., Choi Y., Choi Y. K., Cole S., Danilov M., Dash M., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou W. -S., Hsiung Y. B., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kajiwara S., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee J. S., Lee S. E., Lesiak T., Lin S. -W., Liu Y., Liventsev D., Mandl F., Marlow D., Matyja A., McOnie S., Medvedeva T., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Nagasaka Y., Nakamura I., Nakao M., Nishida S., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Pakhlova G., Park H., Park K. S., Pestotnik R., Piilonen L. E., Sakai Y., Schneider O., Schuemann J., Schwanda C., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shen C. P., Shibuya H., Shinomiya S., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Sumisawa K., Sumiyoshi T., Tajima O., Takasaki F., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tikhomirov I., Trabelsi K., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Vervink K., Villa S., Vinokurova A., Wang C. C., Wang C. H., Wang M. -Z., Wang P., Watanabe Y., Wedd R., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   99 ( 22 )   2007.11( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.99.221802

  • Search for the CP-Violating Decays Upsilon(4S)->(BB0)-B-0 -> J/psi K-S(0)+J/psi(eta(c))K-S(0) Reviewed

    Tajima O., Hazumi M., Adachi I., Aihara H., Aulchenko V., Aushev T., Bakich A. M., Barberio E., Bay A., Bedny I., Bhardwaj V., Bitenc U., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chang P., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chiang C. -C., Chistov R., Cho I. -S., Choi Y., Choi Y. K., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Go A., Gokhroo G., Golob B., Haba J., Hayasaka K., Hayashii H., Heffernan D., Hokuue T., Hoshi Y., Hou W. -S., Hsiung Y. B., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kaji H., Kang J. H., Kataoka S. U., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim H. O., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kwon Y. -J., Lange J. S., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Lin S. -W., Liventsev D., Mandl F., Marlow D., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mizuk R., Mohapatra D., Nagasaka Y., Nakano E., Nakao M., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ohshima T., Okuno S., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Sekiya A., Senyo K., Sevior M. E., Shapkin M., Shen C. P., Shibuya H., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Sumisawa K., Sumiyoshi T., Takasaki F., Tanaka M., Taylor G. N., Teramoto Y., Trabelsi K., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Vervink K., Villa S., Vinokurova A., Wang C. C., Wang C. H., Wang M. -Z., Wang P., Watanabe Y., Wedd R., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Yuan C. Z., Yusa Y., Zhang C. C., Zhang Z. P., Zhilich V., Zhulanov V., Zupanc A.

    PHYSICAL REVIEW LETTERS   99 ( 21 )   2007.11( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.99.211601

  • Measurements of time-dependent CP violation in B-0 ->omega K-S(0), f(0)(980)K-S(0), K-S(0)pi(0) and (K+K-KS0) decays Reviewed

    Chao Y., Chen K. -F., Miyake H., Tajima O., Trabelsi K., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Bakich A. M., Barberio E., Bitenc U., Bizjak I., Blyth S., Bondar A., Bracko M., Browder T. E., Chang M. -C., Chang P., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Golob B., Ha H., Haba J., Hara K., Hara T., Hastings N. C., Hayashii H., Hazumi M., Heffernan D., Higuchi T., Hokuue T., Hoshi Y., Hou W. -S., Hsiung Y. B., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Kapusta P., Kawai H., Kawasaki T., Kim H. J., Kim H. O., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee M. J., Lesiak T., Limosani A., Lin S. -W., Liventsev D., Matsumoto T., McOnie S., Miyabayashi K., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Moloney G. R., Nakahama Y., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Pestotnik R., Piilonen L. E., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumisawa K., Sumiyoshi T., Suzuki S., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Tsukamoto T., Uehara S., Ueno K., Unno Y., Uno S., Ushiroda Y., Usov Y., Varner G., Varvell K. E., Villa S., Vinokurova A., Wang C. H., Watanabe Y., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Yusa Y., Zhilich V., Zhulanov V., Zupanc A.

    PHYSICAL REVIEW D   76 ( 9 )   2007.11( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.76.091103

  • Measurement of branching fraction and time-dependent CP asymmetry parameters in B-0 ->(D*+D*-KS0) decays Reviewed

    Dalseno J., Adachi I., Aihara H., Aushev T., Bakich A. M., Balagura V., Bay A., Bitenc U., Bizjak I., Bozek A., Bracko M., Browder T. E., Chao Y., Chen A., Cheon B. G., Chistov R., Cho I. -S., Choi Y., Choi Y. K., Danilov M., Dash M., Drutskoy A., Eidelman S., Go A., Ha H., Hayasaka K., Hazumi M., Heffernan D., Hokuue T., Hyun H. J., Inami K., Ishikawa A., Ishino H., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim Y. J., Kinoshita K., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee J. S., Lee S. E., Lesiak T., Li J., Limosani A., Lin S. -W., Liventsev D., Mandl F., Matsumoto T., McOnie S., Medvedeva T., Mitaroff W., Miyake H., Miyata H., Moloney G. R., Nakano E., Nakao M., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Onuki Y., Ostrowicz W., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Park K. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Schneider O., Schuemann J., Seidl R., Sekiya A., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Stoeck H., Sumisawa K., Sumiyoshi T., Takasaki F., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tsukamoto T., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Varner G., Villa S., Vinokurova A., Wang C. C., Wang C. H., Watanabe Y., Wedd R., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW D   76 ( 7 )   2007.10( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.76.072004

  • Study of τ- → K<inf>S</inf> π- ν<inf>τ</inf> decay at Belle Reviewed

    D. Epifanov, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   654 ( 3-4 )   65 - 73   2007.10( ISSN:03702693

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    We present a study of the decay τ- → KS π- ντ using a 351  fb-1 data sample collected with the Belle detector. The analysis is based on 53, 110 lepton-tagged signal events. The measured branching fraction B (τ- → KS π- ντ) = (0.404 ± 0.002 (stat .) ± 0.013 (syst .)) % is consistent with the world average value and has better accuracy. An analysis of the KS π- invariant mass spectrum reveals contributions from the K* (892)- as well as other states. For the first time the K* (892)- mass and width have been measured in τ decay: M (K* (892)-) = (895.47 ± 0.20 (stat .) ± 0.44 (syst .) ± 0.59 (mod .))   MeV / c2, Γ (K* (892)-) = (46.2 ± 0.6 (stat .) ± 1.0 (syst .) ± 0.7 (mod .))   MeV. The K* (892)- mass is significantly different from the current world average value. © 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.08.045

  • Measurement of Einstein-Podolsky-Rosen-type flavor entanglement in Υ(4S)→B0B̄0 decays Reviewed

    A. Go, A. Bay, et. al. [Belle Collaboation]

    Physical Review Letters   99 ( 13 )   2007.09( ISSN:00319007

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    The neutral B meson pair produced at the Υ(4S) should exhibit a nonlocal correlation of the type discussed by Einstein, Podolsky, and Rosen. We measure this correlation using the time-dependent flavor asymmetry of semileptonic B0 decays, which we compare with predictions from quantum mechanics and two local realistic models. The data are consistent with quantum mechanics, and inconsistent with the other models. Assuming that some B pairs disentangle to produce B0 and B̄0 with definite flavor, we find a decoherent fraction of 0.029±0.057, consistent with no decoherence. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.99.131802

  • Measurement of D0-D̄0 mixing parameters in D0→Ksπ+π- decays Reviewed

    L. M. Zhang, Z. P. Zhang, et. al. [Belle Collaboation]

    Physical Review Letters   99 ( 13 )   2007.09( ISSN:00319007

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    We report a measurement of D0-D̄0 mixing parameters in D0→KS0π+π- decays using a time-dependent Dalitz-plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540fb-1 of data accumulated with the Belle detector at the KEKB e+e- collider. Assuming negligible CP violation, we measure the mixing parameters x=(0.80±0.29-0.07-0.14+0.09+0.10)% and y=(0.33±0.24-0. 12-0.08+0.08+0.06)%, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the CP-violating parameters |q/p|=0.86-0.29-0.03+0.30+0. 06±0.08 and arg (q/p)=(-14-18-3-4+16+5+2)°. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.99.131803

  • Observation of the decay B̄0→Ds+Λp̄ Reviewed

    T. Medvedeva, R. Chistov, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   76 ( 5 )   2007.09( ISSN:15507998

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    We report the first observation of the decay B̄0→Ds+Λ p̄ with a statistical significance of 6.6σ. We measure B(B̄0→Ds+Λp̄)=(2.9±0.7±0.5±0.4) ×10-5, where the first error is statistical, the second is systematic, and the third error comes from the uncertainty in B(Ds+→π+). The data used for this analysis was accumulated at the Υ(4S) resonance, using the Belle detector at the KEKB asymmetric-energy e+e- collider. The integrated luminosity of the data sample is 414fb-1, corresponding to 449×106 BB̄ pairs. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.76.051102

  • Measurements of branching fractions for bâ†KÏ€ and Bâ†Ï€Ï€ decays Reviewed

    S. W. Lin, P. Chang, et. al. [Belle Collaboation]

    Physical Review Letters   99 ( 12 )   2007.09( ISSN:00319007

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    We report measurements of branching fractions for Bâ†KÏ € and Bâ†Ï€Ï€ decays based on a data sample of 449Ã-106 BB pairs collected at the Î¥(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We also measure the ratios of partial widths for Bâ†KÏ€ decays, namely Rcâ‰2Î"(B+â†K+Ï€0) /Î"(B+↠K0Ï€+)=1.08±0. 06±0.08 and Rnâ‰Î"(B0↠K+Ï€-)/2Î"(B0↠K0Ï€0)=1. 08±0.08±0.08, where the first and the second errors are statistical and systematic, respectively. These ratios are sensitive to enhanced electroweak penguin contributions from new physics; the new measurements are, however, consistent with standard model expectations. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.99.121601

  • Study of B+→pΛ̄γ, pΛ̄π0 and B0→pΛ̄π- Reviewed

    M. Z. Wang, Y. J. Lee, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   76 ( 5 )   2007.09( ISSN:15507998

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    We study the following charmless baryonic three-body decays of B mesons: B+→pΛ̄γ, B+→pΛ̄π0, and B0→pΛ̄π-. The partial branching fractions as a function of the baryon-antibaryon mass and the polar angle distributions of the proton in the baryon-antibaryon system are presented. This study includes the first observation of B+→pΛ̄π0, which is measured to have a branching fraction of (3.00-0.53+0.61±0.33)×10-6. We also set upper limits on branching fractions of the two-body decays B0→pΣ̄ *-, B0→Δ0Λ̄, B+→pΣ̄*0, and B+→Δ+Λ̄ at the 90% confidence level. These results are obtained from a 414fb-1 data sample collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.76.052004

  • Large-aperture hybrid photo-detector Reviewed

    Y. Kawai, H. Nakayama, A. Kusaka, H. Kakuno, T. Abe, M. Iwasaki, H. Aihara, M. Tanaka, M. Shiozawa, H. Kyushima, M. Suyama

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   579   42 - 45   2007.08( ISSN:01689002

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    We have developed the first complete large-aperture (13-inch diameter) hybrid photo-detector (HPD). The withstanding voltage problem has been overcome and we were able to attain an HPD operating voltage of +20 kV. Adoption of our newly developed backside illumination avalanche diode (AD) was also critical in successfully countering the additional problem of an increase in AD leakage after the activation process. We observed single photon signal timing jitter of under 450 ps in FWHM, electron transit time of ∼12 ns, and clear pulse height separation up to several photoelectron peaks, all greatly superior to the performance of any conventional large-aperture photomultiplier tubes (PMTs). In addition, our HPD has a much simpler structure than conventional large-aperture PMTs, which simplifies mass production and lowers manufacturing cost. We believe that these attributes position our HPD as the most suitable photo-detector for the next generation mega-ton class water-Cherenkov detector, which is expected to be more than 20× larger than the Super-Kamiokande (SK) detector. © 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2007.04.010

  • A study of gamma gamma ->(KSKS0)-K-0 production at energies from 2.4 to 4.0 GeV at Belle - Belle collaboration Reviewed

    Chen W. T., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Aulchenko V., Bakich A. M., Barberio E., Bay A., Bedny I., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Browder T. E., Chang M.-C., Chang P., Chao Y., Chen A., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Dalseno J., Dash M., Drutskoy A., Eidelman S., Epifanov D., Go A., Ha H., Hazumi M., Heffernan D., Higuchi T., Hokuue T., Hoshi Y., Hou W.-S., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Kaji H., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. O., Kim Y. J., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y.-J., Lee S. E., Lesiak T., Lin S.-W., Liventsev D., Majumder G., Mandl F., Matsumoto T., Matyja A., McOnie S., Medvedeva T., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Nozaki T., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schuemann J., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shwartz B., Singh J. B., Sokolov A., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Suzuki S. Y., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Tsukamoto T., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Usov Y., Varner G., Vervink K., Villa S., Wang C. C., Wang C. H., Wang M.-Z., Watanabe Y., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICS LETTERS B   651 ( 1 )   15 - 21   2007.07( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2007.05.059

  • High Statistics Measurement of the Cross Sections of γγ→π+π-Production Reviewed

    Mori T., Uehara S., Watanabe Y., Abe K., Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., M. Bakich A., Balagura V., Barberio E., Bay A., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., E. Browder T., Chang M.-C., Chen A., T. Chen W., G. Cheon B., Cho I.-S., Choi S.-K., Choi Y., Dalseno J., Dash M., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Golob B., Ha H., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou W.-S., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., H. Kang J., Kapusta P., Katayama N., Kawasaki T., Kichimi H., O. Kim H., K. Kim S., J. Kim Y., Korpar S., Krokovny P., Kumar R., C. Kuo C., Kuzmin A., Kwon Y.-J., J. Lee M., E. Lee S., Lesiak T., Li J., Limosani A., Lin S.-W., Liventsev D., MacNaughton J., Mandl F., Matsumoto T., Matyja A., McOnie S., Medvedeva T., Miyake H., Miyata H., Miyazaki Y., Mizuk R., R. Moloney G., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ohshima T., Okuno S., L. Olsen S., Ono S., Onuki Y., Ostrowicz W., Ozaki H., Pakhlov P., Pakhlova G., W. Park C., Park H., S. Park K., Pestotnik R., E. Piilonen L., Poluektov A., Sahoo H., Sakai Y., Satoyama N., Schneider O., Senyo K., E. Sevior M., Shapkin M., P. Shen C., Shibuya H., Shwartz B., B. Singh J., Sokolov A., Somov A., Soni N., Stoeck H., Sumiyoshi T., Y. Suzuki S., Takasaki F., Tamai K., Tanaka M., N. Taylor G., Teramoto Y., C. Tian X., Tikhomirov I., Tsuboyama T., Tsukamoto T., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Vervink K., Villa S., Vinokurova A., H. Wang C., Wang P., Won E., L. Xie Q., D. Yabsley B., Yamaguchi A., Yamashita Y., C. Zhang C., P. Zhang Z., Zhilich V., Zhulanov V., Zupanc A.

    Physical Society of Japan, Journal of the Physical Society of Japan   76 ( 7 )   74102 - 74102   2007.07( ISSN:0031-9015

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    CiNii Article

  • High Statistics Measurement of the Cross Sections of γγ→π^+π^- Production Reviewed

    Mori T., Uehara S., Watanabe Y., ABE K., ADACHI I., AIHARA H., ARINSTEIN K., AULCHENKO V., AUSHEV T., BAKICH A. M., BALAGURA V., BARBERIO E., BAY A., BELOUS K., BITENC U., BIZJAK I., BLYTH S., BONDAR A., BRACKO M., BROWDER T. E., CHANG M.-C., CHEN A., CHEN W. T., CHEON B. G., CHO I.-S., CHOI S.-K., CHOI Y., DALSENO J., DASH M., DRUTSKOY A., EIDELMAN S., FRATINA S., GABYSHEV N., GOLOB B., HA H., HAYASAKA K., HAYASHII H., HAZUMI M., HEFFERNAN D., HOKUUE T., HOSHI Y., HOU W.-S., IIJIMA T., IKADO K., IMOTO A., INAMI K., ISHIKAWA A., ITOH R., IWASAKI M., IWASAKI Y., KAJI H., KANG J. H., KAPUSTA P., KATAYAMA N., KAWASAKI T., KICHIMI H., KIM H. O., KIM S. K., KIM Y. J., KORPAR S., KRIZAN P., KROKOVNY P., KUMAR R., KUO C. C., KUZMIN A., KWON Y.-J., LEE M. J., LEE S. E., LESIAK T., LI J., LIMOSANI A., LIN S.-W., LIVENTSEV D., MACNAUGHTON J., MANDL F., MATSUMOTO T., MATYJA A., MCONIE S., MEDVEDEVA T., MIYAKE H., MIYATA H., MIYAZAKI Y., MIZUK R., MOLONEY G. R., NAGASAKA Y., NAKANO E., NAKAO M., NAKAZAWA H., NATKANIEC Z., NISHIDA S., NITOH O., NOGUCHI S., OHSHIMA T., OKUNO S., OLSEN S. L., ONO S., ONUKI Y., OSTROWICZ W., OZAKI H., PAKHLOV P., PAKHLOVA G., PARK C. W., PARK H., PARK K. S., PESTOTNIK R., PIILONEN L. E., POLUEKTOV A., SAHOO H., SAKAI Y., SATOYAMA N., SCHNEIDER O., SCHUMANN J., SENYO K., SEVIOR M. E., SHAPKIN M., SHEN C. P., SHIBUYA H., SHWARTZ B., SINGH J. B., SOKOLOV A., SOMOV A., SONI N., STANIC S., STARIC M., STOECK H., SUMIYOSHI T., SUZUKI S. Y., TAKASAKI F., TAMAI K., TANAKA M., TAYLOR G. N., TERAMOTO Y., TIAN X. C., TIKHOMIROV I., TSUBOYAMA T., TSUKAMOTO T., UENO K., UGLOV T., UNNO Y., UNO S., URQUIJO P., USOV Y., VARNER G., VERVINK K., VILLA S., VINOKUROVA A., WANG C. H., WANG P., WON E., XIE Q. L., YABSLEY B. D., YAMAGUCHI A., YAMASHITA Y., ZHANG C. C., ZHANG Z. P., ZHILICH V., ZHULANOV V., ZUPANC A.

    一般社団法人日本物理学会 Journal of the Physical Society of Japan   76 ( 7 )   "74102 - 1"-"74102-11"   2007.07( ISSN:00319015

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    We report on a high statistics measurement of the total and differential cross sections of the process γγ→π^+π^- in theπ^+π^- invariant mass range 0.8GeV/c^2<W<1.5GeV/c^2 with 85.9fb^<-1> of data collected at √<s>=10.58GeV and 10.52GeV with the Belle detector. A clear signal of the f_0(980) resonance is observed in addition to the f_2(1270) resonance. An improved 90% confidence level upper limit B(η'(958)→π^+π^-)<2.9×10^<-3> is obtained for P- and CP-violating decay of the η'(958) meson using the most conservative assumption about the interference with the background.

    CiNii Article

  • Measurements of exclusive B-s(0) decays at the Upsilon(5S) resonance Reviewed

    Drutskoy A., Abe K., Adachi I., Aihara H., Anipko D., Bakich A. M., Barberio E., Bedny I., Bitenc U., Bizjak I., Blyth S., Bondar A., Bracko M., Browder T. E., Chang M.-C., Chang P., Chao Y., Chen A., Chen K.-F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Dalseno J., Danilov M., Dash M., Dragic J., Eidelman S., Fratina S., Gabyshev N., Golob B., Ha H., Haba J., Hara T., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou W.-S., Hsiung Y. B., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kapusta P., Kawai H., Kawasaki T., Kim H. J., Kim H. O., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y.-J., Lee M. J., Limosani A., Lin S.-W., Liventsev D., MacNaughton J., Majumder G., Matsumoto T., McOnie S., Mitaroff W., Miyabayashi K., Miyata H., Miyazaki Y., Moloney G. R., Nakano E., Nakao M., Natkaniec Z., Nishida S., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Pestotnik R., Piilonen L. E., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schuemann J., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumisawa K., Sumiyoshi T., Suzuki S., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Uehara S., Ueno K., Unno Y., Uno S., Ushiroda Y., Usov Y., Varner G., Villa S., Vinokurova A., Wang C. H., Watanabe Y., Wicht J., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhilich V., Zhulanov V., Zupanc A.

    PHYSICAL REVIEW D   76 ( 1 )   2007.07( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.76.012002

  • Measurement of the τ lepton mass and an upper limit on the mass difference between τ+ and τ- Reviewed

    K. Belous, M. Shapkin, A. Sokolov, et. al. [Belle Collaboation]

    Physical Review Letters   99 ( 1 )   2007.07( ISSN:00319007

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    The mass of the τ lepton has been measured in the decay mode τ→3πντ using a pseudomass technique. The result obtained from 414fb-1 of data collected with the Belle detector is Mτ=[1776.61±0. 13(stat)±0.35(sys)]MeV/c2. The upper limit on the relative mass difference between positive and negative τ leptons is |Mτ+-Mτ-|/ Mτ<2.8×10-4 at 90% confidence level. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.99.011801

  • Study of B̄0→D0π+π- decays Reviewed

    A. Kuzmin, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   76 ( 1 )   2007.07( ISSN:15507998

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    We report the results of a study of neutral B meson decays to the D0π+π- final state, where the D0 is fully reconstructed. The results are obtained from an event sample containing 388×106 BB̄-meson pairs collected in the Belle experiment at the KEKB e+e- collider. The total branching fraction of the three-body decay B(B̄0→D0π+π-)=(8.4±0. 4(stat)±0.8(syst))×10-4 has been measured. The intermediate resonant structure of these three-body decays has been studied. From a Dalitz plot analysis we have obtained the product of the branching fractions for D2*+ and D0*+ production: B(B̄0→D2*+π-) ×B(D2*+→D0π+)=(2.15±0.17(stat)±0.29(syst) ±0.12(mod))×10-4, and B(B̄0→D0*+π-) ×B(D0*+→D0π+)=(0.60±0.13(stat)±0.15(syst) ±0.22(mod))×10-4. This is the first observation of the B̄0→D0*+π- decay. The B̄0→D0ρ0 and D0f2 branching fractions are measured to be: B(B̄0→D0ρ0)=(3. 19±0.20(stat)±0.24(syst)±0.38(mod))×10-4, and B(B̄0→D0f2)=(1.20±0.18(stat)±0.21(syst)±0.32(mod) )×10-4. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.76.012006

  • Improved measurement of CP-violating parameters in B→ρ+ρ- decays Reviewed

    A. Somov, A. J. Schwartz, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   76 ( 1 )   2007.07( ISSN:15507998

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    We present a measurement of the CP-violating asymmetry in B0→ρ+ρ- decays using 535×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider. We measure CP-violating coefficients A=0.16±0.21(stat)±0.08(syst) and S=0.19±0. 30(stat)±0.08(syst). These values are used to determine the unitarity triangle angle 2 using an isospin analysis; the solution consistent with the standard model lies in the range 54°< 2<113° at the 90% confidence level. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.76.011104

  • High statistics measurement of the cross sections of γγ → π +π - production Reviewed

    T. Mori, S. Uehara, Y. Watanabe, et. al. [Belle Collaboation]

    Journal of the Physical Society of Japan   76 ( 7 )   74102 - 74102   2007.07( ISSN:00319015

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    We report on a high statistics measurement of the total and differential cross sections of the process γγ → π +π - in the π +π - invariant mass range 0.8 GeV/c 2 < W < 1.5 GeV/c 2 with 85.9 fb -1 of data collected at √s = 10.58 GeV and 10.52 GeV with the Belle detector. A clear signal of the f 0(980) resonance is observed in addition to the f 2(1270) resonance. An improved 90% confidence level upper limit ℬ(η′(958) → π +π - < 2.9 × 10 -3 is obtained for P- and CP-violating decay of the η′(958) meson using the most conservative assumption about the interference with the background. ©2007 The Physical Society of Japan.

    DOI: 10.1143/JPSJ.76.074102

    CiNii Article

  • Experimental constraints on the spin and parity of the Lambda(c)(2880)(+) Reviewed

    Mizuk R., Abe K., Adachi I., Aihara H., Anipko D., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang M.-C., Chen A., Chen K.-F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Danilov M., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Garmash A., Gershon T., Gokhroo G., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W.-S., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Kapusta P., Katayama N., Khan H. R., Kichimi H., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y.-J., Leder G., Lee J., Lee M. J., Lee S. E., Lesiak T., Lin S.-W., Liventsev D., Majumder G., Mandl F., Matsumoto T., Matyja A., McOnie S., Miyake H., Miyata H., Miyazaki Y., Nakao M., Natkaniec Z., Nishida S., Ogawa S., Ohshima T., Okuno S., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park H., Park K. S., Peak L. S., Pestotnik R., Piilonen L. E., Sakai Y., Satoyama N., Schneider O., Schuemann J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Suzuki S. Y., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Ueno K., Uno S., Urquijo P., Usov Y., Varner G., Villa S., Wang C. H., Watanabe Y., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Yuan C. Z., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   98 ( 26 )   2007.06( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.98.262001

  • Evidence for CP violation in B-0 -> D+D- decays Reviewed

    Fratina S., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aushev T., Bakich A. M., Barberio E., Bay A., Belous K., Bitenc U., Bizjak I., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang M.-C., Chang P., Chao Y., Chen A., Chen K.-F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Dash M., Drutskoy A., Eidelman S., Go A., Golob B., Gorisek A., Ha H., Haba J., Hara K., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou W.-S., Iijima T., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim H. O., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y.-J., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S.-W., Liventsev D., Mandl F., Matsumoto T., Matyja A., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Nakazawa H., Nishida S., Noguchi S., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schuemann J., Schwanda C., Schwartz A. J., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shwartz B., Singh J. B., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumiyoshi T., Takasaki F., Tamai K., Tanaka M., Teramoto Y., Tian X. C., Tikhomirov I., Trabelsi K., Tsukamoto T., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Vervink K., Villa S., Wang C. H., Watanabe Y., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   98 ( 22 )   2007.06( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.98.221802

  • Measurement of CP asymmetry in a time-dependent dalitz analysis of B0→(ρπ)0 and a constraint on the quark mixing matrix angle 2 Reviewed

    A. Kusaka, C. C. Wang, H. Ishino, et. al. [Belle Collaboation]

    Physical Review Letters   98   2007.06( ISSN:00319007

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    We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0→π+π-π0 decays based on a 414fb-1 data sample containing 449×106BB̄ pairs. The data was collected on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle 2, 68°< 2<95° as the 68.3% confidence interval for the 2 solution consistent with the standard model (SM). A large SM-disfavored region also remains. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.98.221602

  • Search for B0→pp̄, ΛΛ̄ and B+→pΛ̄ at Belle Reviewed

    Y. T. Tsai, P. Chang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 11 )   2007.06( ISSN:15507998

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    We report on a new search for two-body baryonic decays of the B meson. Improved sensitivity compared to previous Belle results is obtained from 414fb-1 of data that corresponds to 449×106 BB̄ pairs, which were taken on the Υ(4S) resonance and collected with the Belle detector at the KEKB e+e- collider. No significant signals are observed and we set the 90% confidence level upper limits: B(B0→pp̄)<1.1×10-7, B(B0→Λ Λ̄)<3.2×10-7, and B(B+→pΛ̄)<3. 2×10-7. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.111101

  • Evidence for D-0-(D)over-bar(0) mixing Reviewed

    Staric M., Golob B., Abe K., Abe K., Adachi I., Aihara H., Arinstein K., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Bay A., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K.-F., Chen W. T., Cheon B. G., Chistov R., Cho I.-S., Choi S.-K., Choi Y., Cole S., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Garmash A., Gorisek A., Ha H., Haba J., Hara T., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Higuchi T., Hokuue T., Hoshi Y., Hou W.-S., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kapusta P., Katayama N., Kawasaki T., Kibayashi A., Kichimi H., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y.-J., Lange J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Limosani A., Lin S.-W., Liventsev D., Mandl F., Marlow D., Matsumoto T., Matyja A., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Nagasaka Y., Nakamura I., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Pestotnik R., Piilonen L. E., Poluektov A., Rozanska M., Sahoo H., Sakai Y., Satoyama N., Schneider O., Mann J. Schu R., Schwanda C., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shen C. P., Shibuya H., Shwartz B., Sokolov A., Somov A., Stanic S., Stoeck H., Sumisawa K., Sumiyoshi T., Suzuki S., Suzuki S. Y., Tajima O., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Ueno K., Uglov T., Unno Y., Uno S., Urquijo P., Ushiroda Y., Usov Y., Varner G., Varvell K. E., Vervink K., Villa S., Vinokurova A., Wang C. H., Wang M.-Z., Watanabe Y., Wicht J., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamamoto H., Yamashita Y., Yamauchi M., Yuan C. Z., Yuan Y., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   98 ( 21 )   2007.05( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.98.211803

  • Observation of B decays to two kaons Reviewed

    Lin S.-W., Chang P., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aulchenko V., Aushev T., Aziz T., Bakich A. M., Barberio E., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Chao Y., Chen A., Chen K.-F., Chen W. T., Cheon B. G., Chistov R., Choi S.-K., Choi Y., Choi Y. K., Dalseno J., Dash M., Dragic J., Eidelman S., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou S., Hou W.-S., Hsiung Y. B., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Kulasiri R., Kuo C. C., Kwon Y.-J., Lange J. S., Lee J., Lee M. J., Lee S. E., Lesiak T., Limosani A., Mandl F., Matsumoto T., McOnie S., Mitaroff W., Miyabayashi K., Miyaki H., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Mori T., Nakamura I., Nakano E., Nakao M., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Park K. S., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schuemann J., Schwartz A. J., Senyo K., Shapkin M., Singh J. B., Sokolov A., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumiyoshi T., Tajima O., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Trabelsi K., Tsukamoto T., Uehara S., Uglov T., Ueno K., Unno Y., Uno S., Usov Y., Varner G., Villa S., Wang C. C., Wang C. H., Wang M.-Z., Watanabe Y., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   98 ( 18 )   2007.05( ISSN:0031-9007

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  • Measurement of charmless B decays to eta K-* and eta rho Reviewed

    Wang C. H., Abe K., Adachi I., Aihara H., Anipko D., Aushev T., Bakich A. M., Barberio E., Bay A., Belous K., Bitenc U., Blyth S., Bondar A., Bozek A., Bracko M., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Garmash A., Gershon T., Gokhroo G., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou W.-S., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Kapusta P., Katayama N., Khan H. R., Kichimi H., Kim Y. J., Kinoshita K., Kulasiri R., Kumar R., Kuo C. C., Kwon Y.-J., Leder G., Lee M. J., Lee S. E., Lesiak T., Lin S.-W., Liventsev D., MacNaughton J., Matsumoto T., Matyja A., McOnie S., Miyake H., Miyata H., Mizuk R., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park H., Park K. S., Pestotnik R., Piilonen L. E., Sakai Y., Satoyama N., Schneider O., Schumann J., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Sokolov A., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Suzuki S. Y., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Ueno K., Urquijo P., Usov Y., Varner G., Villa S., Wang M.-Z., Watanabe Y., Won E., Xie Q. L., Yamaguchi A., Yamashita Y., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW D   75 ( 9 )   2007.05( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.75.092005

  • Observation of B decays to two kaons Reviewed

    S. W. Lin, P. Chang, et. al. [Belle Collaboation]

    Physical Review Letters   98   2007.05( ISSN:00319007

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    Using 449×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we observe clear signals for B+→K̄0K+ and B0→K̄0K0 decays with 5.3σ and 6.0σ significance, respectively. We measure the branching fractions B(B+→K̄0K+)=(1.22-0.28-0.16+0.32+0.13)×10-6 and B(B0→K̄0K0)=(0.87-0.20+0.25±0.09)×10-6, and partial-rate asymmetries ACP(B+→K̄0K+)=0.13-0.24+0.23±0.02 and ACP(B0→K̄0K0)=-0.58-0.66+0.73±0.04. From a simultaneous fit, we also obtain B(B+→K0π+)=(22.8-0.7+0.8±1.3)×10-6 and ACP(B+→K0π+)=0.03±0.03±0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B0→K+K- decays, and for this branching fraction, we set an upper limit of 4.1×10-7 at the 90% confidence level. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.98.181804

  • Measurements of branching fractions and q2 distributions for B → π ℓ ν and B → ρ ℓ ν decays with B → D(*) ℓ ν decay tagging Reviewed

    T. Hokuue, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   648   139 - 148   2007.05( ISSN:03702693

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    We report measurements of the charmless semileptonic decays B0 → π- / ρ- ℓ+ ν and B+ → π0 / ρ0 ℓ+ ν, based on a sample of 2.75 × 108B over(B, ̄) events collected at the Υ{hooked} (4 S) resonance with the Belle detector at the KEKB e+ e- asymmetric collider. In this analysis, the accompanying B meson is reconstructed in the semileptonic mode B → D(*) ℓ ν, enabling detection of the signal modes with high purity. We measure the branching fractions B (B0 → π- ℓ+ ν) = (1.38 ± 0.19 ± 0.14 ± 0.03) × 10-4, B (B0 → ρ- ℓ+ ν) = (2.17 ± 0.54 ± 0.31 ± 0.08) × 10-4, B (B+ → π0 ℓ+ ν) = (0.77 ± 0.14 ± 0.08 ± 0.00) × 10-4 and B (B+ → ρ0 ℓ+ ν) = (1.33 ± 0.23 ± 0.17 ± 0.05) × 10-4, where the errors are statistical, experimental systematic, and systematic due to form factor uncertainties, respectively. For each mode we also present the partial branching fractions in three q2 intervals: q2 < 8, 8 ≤ q2 < 16, and q2 ≥ 16   GeV2 / c2. From our partial branching fractions for B → π ℓ ν and recent results for the form factor from unquenched Lattice QCD calculations, we obtain values of the CKM matrix element | Vu b |. © 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.02.067

  • Search for lepton flavor violating τ- decays into ℓ- η, ℓ- η and ℓ- π0 Reviewed

    Y. Miyazaki, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   648 ( 5-6 )   341 - 350   2007.05( ISSN:03702693

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    We have searched for lepton-flavor-violating τ decays with a pseudoscalar meson (η, η′ and π0) using a data sample of 401 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is found and we set the following upper limits on the branching fractions: B (τ- → e- η) < 9.2 × 10-8, B (τ- → μ- η) < 6.5 × 10-8, B (τ- → e- η′) < 1.6 × 10-7, B (τ- → μ- η′) < 1.3 × 10-7, B (τ- → e- π0) < 8.0 × 10-8 and B (τ- → μ- π0) < 1.2 × 10-7 at the 90% confidence level. These results improve our previously published upper limits by factors from 2.3 to 6.3. © 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.03.027

  • Search for B decays into η′p, η′K*, η′, η′ω and η′η(′) Reviewed

    J. Schümann, C. H. Wang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75   2007.05( ISSN:15507998

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    We report on a search for the exclusive two-body charmless hadronic B meson decays B→η′ρ, B→η′K*, B0→η′, B0→η′ω, and B0→η′η (′). The results are obtained from a data sample containing 535×106 BB̄ pairs that were collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no significant signals and report upper limits in the range (0.5-6.5)×10-6 for all of the above decays. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.092002

  • Improved measurements of branching fractions and CP asymmetries in B→ηh decays Reviewed

    P. Chang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 7 )   2007.04( ISSN:15507998

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    We report improved measurements of B decays with an η meson in the final state using 492fb-1 of data collected by the Belle detector at the KEKB e+e- collider. We observe the decays B±→ηπ± and B±→ηK± and measure the branching fractions B(B±→ηπ±)=(4.2±0.4(stat)±0.2(sys)) ×10-6 and B(B±→ηK±)=(1.9±0.3(stat)-0.1+0. 2(sys))×10-6. The corresponding CP-violating asymmetries are measured to be -0.23±0.09(stat)±0.02(sys) for ηπ± and -0.39±0.16(stat)±0.03(sys) for ηK±. We also search for B0→ηK0 decays and set an upper limit of 1.9×10-6 at the 90% confidence level. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.071104

  • Observation of the decay Υ(4S)→Υ(1S)π+π- Reviewed

    A. Sokolov, M. Shapkin, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 7 )   2007.04( ISSN:15507998

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    We study transitions between Υ states with the emission of charged pions using 477fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured product branching fraction B(Υ(4S)→Υ(1S)π+π-)×B(Υ(1S)→μ+μ-)=(4. 42±0.81(stat)±0.56(sys))×10-6. When the PDG value for B(Υ(1S)→μ+μ-) is used, this corresponds to B(Υ(4S) →Υ(1S)π+π-)=(1.78±0.33(stat)±0.23(sys)) ×10-4 and a partial decay width Γ(Υ(4S)→Υ(1S) π+π-)=(3.65±0.67(stat)±0.65(sys))keV. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.071103

  • A search for the rare leptonic decays B+ → μ+ ν<inf>μ</inf> and B+ → e+ ν<inf>e</inf> Reviewed

    N. Satoyama, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   647   67 - 73   2007.04( ISSN:03702693

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    We present a search for the decays B+ → μ+ νμ and B+ → e+ νe in a 253 fb-1 data sample collected at the Υ{hooked} (4 S) resonance with the Belle detector at the KEKB asymmetric-energy B factory. We find no significant evidence for a signal and set 90% confidence level upper limits of B (B+ → μ+ νμ) < 1.7 × 10-6 and B (B+ → e+ νe) < 9.8 × 10-7. © 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.01.068

  • Search for invisible decay of the Upsilon(1S) Reviewed

    Tajima O., Hayashii H., Hazumi M., Inami K., Iwasaki Y., Uehara S., Abe K., Adachi I., Aihara H., Anipko D., Aulchenko V., Bakich A. M., Barberio E., Bedny I., Belous K., Bitenc U., Bizjak I., Bondar A., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Ha H., Haba J., Hayasaka K., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Iijima T., Ikado K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Kang J. H., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lange J. S., Lee J., Lee M. J., Lesiak T., Limosani A., Lin S. -W., Liventsev D., Majumder G., Mandl F., Matsumoto T., McOnie S., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mori T., Mueller J., Nakamura I., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park H., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schumann J., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shwartz B., Singh J. B., Sokolov A., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumisawa K., Sumiyoshi T., Suzuki S., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Trabelsi K., Tsuboyama T., Tsukamoto T., Uglov T., Uno S., Urquijo P., Ushiroda Y., Usov Y., Varner G., Villa S., Wang C. C., Wang C. H., Wang M. -Z., Watanabe Y., Wedd R., Wicht J., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   98 ( 13 )   2007.03( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.98.132001

  • Measurement of the near-threshold e(+)e(-)-> D-(*D-)+/-(()*()-/+) cross section using initial-state radiation Reviewed

    Pakhlova G., Abe K., Adachi I., Aihara H., Anipko D., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Barberio E., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi S. -K., Choi Y., Choi Y. K., Cole S., Dalseno J., Danilov M., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Gershon T., Gokhroo G., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Kapusta P., Katayama N., Kawasaki T., Khan H. R., Kichimi H., Kim Y. J., Kinoshita K., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee J., Lee M. J., Lee S. E., Lesiak T., Lin S. -W., Liventsev D., Majumder G., Mandl F., Matsumoto T., Matyja A., McOnie S., Medvedeva T., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Park H., Park K. S., Pestotnik R., Piilonen L. E., Poluektov A., Sakai Y., Satoyama N., Schneider O., Schumann J., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shwartz B., Singh J. B., Somov A., Soni N., S. Stanic, M. Staric, Stoeck H., Suzuki S. Y., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Ueno K., Uno S., Urquijo P., Usov Y., Varner G., Villa S., Wang C. H., Watanabe Y., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   98 ( 9 )   2007.03( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.98.092001

  • Observation of the decay B0→J/ψη Reviewed

    M. C. Chang, et. al. [Belle Collaboation]

    Physical Review Letters   98 ( 13 )   2007.03( ISSN:00319007

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    We report the first observation of B0→J/ψη decay. These results are obtained from a data sample that contains 449×106 BB̄ pairs accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe a signal with a significance of 8.1σ and obtain a branching fraction of (9.5±1.7(stat)±0. 8(syst))×10-6. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.98.131803

  • High statistics study of the f0(980) resonance in γγ→π +π- production Reviewed

    T. Mori, S. Uehara, Y. Watanabe, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 5 )   2007.03( ISSN:15507998

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    We report on a high statistics measurement of the cross section of the process γγ→π+π- in the π+π- invariant mass range 0.8GeV/c2<W<1.5GeV/c2 with 85.9fb-1 of data collected at s=10.58GeV and 10.52 GeV with the Belle detector. A clear signal for the f0(980) resonance is observed. From a fit to the mass spectrum, the mass, π+π- and two-photon decay widths of the resonance are found to be 985.6-1.5+1.2(stat)-1.6+1.1(syst) MeV/c2, 34.2-11.8+13.9(stat)-2.5+8.8(syst)MeV, and 205-83+95(stat)-117+147(syst) eV, respectively. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.051101

  • Measurement of inclusive Ds, D0, and J/ψ rates and determination of the Bs(*)B̄s(*) production fraction in bb̄ events at the Υ(5S) resonance Reviewed

    A. Drutskoy, et. al. [Belle Collaboation]

    Physical Review Letters   98 ( 5 )   2007.02( ISSN:00319007

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    The inclusive production of Ds, D0, and J/ψ mesons is studied using a 1.86fb-1 data sample collected on the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The number of bb̄ events in this Υ(5S) data sample is determined. We measure the branching fractions B(Υ(5S)→DsX)/2=(23.6±1.2±3.6)%, B(Υ(5S)→D0X)/2=(53.8±2.0±3.4)%, and B(Υ(5S)→J/ ψX)/2=(1.030±0.080±0.067)%. From the Ds and D0 inclusive branching fractions the ratio fs=(18.0±1.3±3.2)% of Bs(*)B̄s(*) to the total bb̄ quark pair production at the Υ(5S) energy is obtained in a model-dependent way. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.98.052001

  • Observation of a charmoniumlike state produced in association with a J/ψ in e+e- annihilation at s 10.6GeV Reviewed

    K. Abe, et. al. [Belle Collaboation]

    Physical Review Letters   98 ( 8 )   2007.02( ISSN:00319007

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    We report the first observation of a charmoniumlike state recoiling from the J/ψ in the inclusive process e+e-→J/ψ+anything at a mass of (3.943±0.006±0.006)GeV/c2. We also observe the decay of this state into D*D̄ and determine its intrinsic width to be less than 52MeV/c2 at the 90% C.L. These results are obtained from a 357fb-1 data sample collected with the Belle detector near the Υ(4S) resonance, at the KEKB asymmetric-energy e+e- collider. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevLett.98.082001

  • Moments of the electron energy spectrum and partial branching fraction of B→Xceν decays at the Belle detector Reviewed

    P. Urquijo, E. Barberio, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 3 )   2007.02( ISSN:15507998

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    We report a measurement of the inclusive electron energy spectrum for charmed semileptonic decays of B mesons in a 140fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. We determine the first four moments of the electron energy spectrum for threshold values of the electron energy between 0.4 and 2.0 GeV. In addition, we provide values of the partial branching fraction (zeroth moment) for the same electron threshold energies, and independent measurements of the B+ and B0 partial branching fractions at 0.4 GeV and 0.6 GeV electron threshold energies. We measure the independent B+ and B0 partial branching fractions with electron threshold energies of 0.4 GeV to be ΔB(B+→Xceν)=(10. 79±0.25(stat.)±0.27(sys.))% and ΔB(B0→Xceν)=(10. 08±0.30(stat.)±0.22(sys.))%. Full correlations between all measurements are evaluated. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.032001

  • Moments of the hadronic invariant mass spectrum in B -> X(c)l nu decays at Belle Reviewed

    Schwanda C., Abe K., Adachi I., Aihara H., Anipko D., Aulchenko V., Barberio E., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Bondar A., Bozek A., Bracko M., Browder T. E., Chang P., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Dash M., Eidelman S., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Ha H., Haba J., Hazumi M., Heffernan D., Hoshi Y., Hou S., Hou W. -S., Iijima T., Ikado K., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim Y. J., Kinoshita K., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kwon Y. -J., Lange J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. -W., Liventsev D., MacNaughton J., Majumder G., Mandl F., Matsumoto T., Matyja A., McOnie S., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nagamine T., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nozaki T., Ohshima T., Okuno S., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Sakai Y., Satoyama N., Schietinger T., Schneider O., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Somov A., Soni N., Stanic S., Staric M., Stoeck H., Sumiyoshi T., Suzuki S. Y., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tikhomirov I., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Villa S., Wang C. H., Wang M. -Z., Watanabe Y., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW D   75 ( 3 )   2007.02( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.75.032005

  • Observation of time-dependent CP violation in B-0 ->eta K-'(0) decays and improved measurements of CP asymmetries in B-0 ->phi K-0, (KSKSKS0)-K-0-K-0 and B-0 -> J/psi K-0 decays Reviewed

    Chen K. -F., Hara K., Hazumi M., Higuchi T., Miyabayashi K., Nakahama Y., Sumisawa K., Tajima O., Ushiroda Y., Yusa Y., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aulchenko V., Aushev T., Aziz T., Bakich A. M., Balagura V., Banerjee S., Barberio E., Barbero M., Bay A., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi S. -K., Choi Y., Choi Y. K., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Garmash A., Gershon T., Go A., Gokhroo G., Goldenzweig P., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hayashii H., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Hsiung Y. B., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kakuno H., Kang J. H., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kusaka A., Kuzmin A., Kwon Y. -J., Leder G., Lee J., Lee M. J., Lesiak T., Li J., Limosani A., Lin S. -W., Liu Y., Liventsev D., Majumder G., Mandl F., Matsumoto T., Matyja A., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Moloney G. R., Murakami A., Nagamine T., Nagasaka Y., Nakamura I., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ostrowicz W., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park H., Pestotnik R., Piilonen L. E., Sahoo H., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schumann J., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shwartz B., Singh J. B., Sokolov A., Somov A., Stanic S., Staric M., Stoeck H., Sumiyoshi T., Suzuki S., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Ueno K., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Villa S., Wang C. C., Wang C. H., Wang M. -Z., Watanabe Y., Wedd R., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang C. C., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW LETTERS   98 ( 3 )   2007.01( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.98.031802

  • Dalitz analysis of three-body charmless B-0 -> K-0 pi(+) pi(-) decay Reviewed

    Garmash A., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aulchenko V., Aushev T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Barbero M., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Dash M., Dragic J., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Hsiung Y. B., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kapusta P., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim Y. J., Kinoshita K., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee S. E., Lesiak T., Li J., Lin S. -W., Liu Y., Majumder G., Mandl F., Matsumoto T., McOnie S., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Moloney G. R., Nagasaka Y., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Pakhlov P., Pakhlova G., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schumann J., Schwanda C., Schwartz A. J., Senyo K., Shapkin M., Shibuya H., Shwartz B., Sidorov V., Sokolov A., Somov A., Stanic S., Staric M., Stoeck H., Sumisawa K., Sumiyoshi T., Suzuki S. Y., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Tsukamoto T., Uehara S., Uglov T., Ueno K., Unno Y., Uno S., Urquijo P., Ushiroda Y., Usov Y., Varner G., Varvell K. E., Villa S., Wang C. H., Wang M. -Z., Watanabe Y., Won E., Wu C. -H., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW D   75 ( 1 )   2007.01( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.75.012006

  • Study of the charmed baryonic decays B̄0→Σc++p̄π- and B̄0→Σc0p̄π+ Reviewed

    K. S. Park, H. Kichimi, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 1 )   2007.01( ISSN:15507998

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    We study the three-body charmed baryonic decays B̄0→Σ c++p̄π- and B̄0→Σc0p̄π+ in the four-body final state B̄0→Λc+p̄π+π-, using a data sample of 357fb-1 accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the branching fractions B(B̄0→Σc(2455)++p̄π-)=(2.1±0.2±0. 3±0.5)×10-4, B(B̄0→Σc(2455)0p̄π+)=(1. 4±0.2±0.2±0.4)×10-4 and B(B̄0→Σ c(2520)++p̄π-)=(1.2±0.1±0.2±0.3)×10-4 with signal significances of 13.1σ, 9.4σ and 7.1σ, respectively. The errors are statistical, systematic, and due to the uncertainty in B(Λc+→pK-π+), respectively. We also set an upper limit B(B̄0→Σc(2520)0p̄π+)<0.38×10-4 at the 90% confidence level. In addition, we obtain a nonresonant branching fraction of (6.4±0.4±0.9±1.7)×10-4, and a total branching fraction of (11.2±0.5±1.4±2.9)×10-4 for B̄0→Λc+p̄π+π-. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.011101

  • Search for B+-> J/psi eta ' K+ and B-0 -> J/psi eta ' K-S(0) decays Reviewed

    Xie Q. L., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aulchenko V., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Barbero M., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Dash M., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Gershon T., Go A., Gokhroo G., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim Y. J., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee S. E., Lesiak T., Lin S. -W., Liu Y., Majumder G., Mandl F., Matsumoto T., McOnie S., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mueller J., Nagasaka Y., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schumann J., Senyo K., Shapkin M., Shibuya H., Shwartz B., Sidorov V., Sokolov A., Somov A., Stanic S., Staric M., Stoeck H., Sumisawa K., Sumiyoshi T., Suzuki S. Y., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Unno Y., Uno S., Urquijo P., Usov Y., Varner G., Wang C. H., Wang M. -Z., Watanabe Y., Wedd R., Won E., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW D   75 ( 1 )   2007.01( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.75.017101

  • R&D status of readout system for a large photo cathode HAPD Reviewed

    T. Abe, H. Aihara, M. Iwasaki, H. Miyatake, T. Uchida, M. Tanaka, Y. Kawai, H. Kyushima, M. Suyama, Y. Ffigashi, T. Mizukami, S. Nakano

    IEEE 2007 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOLS 1-11   2373 - +   2007( ISSN:1082-3654

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    We develop a readout system dedicated for a Hybrid Avalanche Photo-Detector (HAPD). We employ a waveform sampling and digital signal processing (DSP) technique for the system. We fabricate the first prototype of the system. The system is composed of an analog memory cell (AMC) as the waveform sampler and FINENET with field programmable gate arrays (FPGA) to give low power consumption, high resolution, flexible DSP environment and fast output data transfer. A 64-cell AMC is developed and attained a fast sampling speed of 1GHz with the low power consumption of similar to 72mW. FINENET works with online DSP functionality and achieved the data transfer rate to similar to 1Gbps with SiTCP. We report the performance of the system with HAPD.

  • Evidence of the purely leptonic decay B- -> tau(-)(v)over-bar(tau) Reviewed

    Ikado K., Abe K., Abe K., Adachi I., Aihara H., Akai K., Akemoto M., Anipko D., Arinstein K., Aulchenko V., Aushev T., Aziz T., Bakich A. M., Balagura V., Barbero M., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Bondar A., Bozek A., Bracko M., Browder T. E., Chang P., Chen A., Chen W. T., Choi Y., Cole S., Dalseno J., Danilov M., Dash M., Eidelman S., Epifanov D., Flanagan J., Fratina S., Furukawa K., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Gorisek A., Ha H., Haba J., Hara K., Hara T., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Iida N., Iijima T., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kamitani T., Kang J. H., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kikutani E., Kim H. J., Kim H. O., Kinoshita K., Koiso H., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lange J. S., Leder G., Lee J., Lesiak T., Limosani A., Lin S. -W., Liventsev D., Marlow D., Matsumoto T., Matyja A., McOnie S., Michizono S., Mimashi T., Mitaroff W., Miyabayashi K., Miyata H., Miyazaki Y., Mizuk R., Nagamine T., Nakamura I., Nakamura T. T., Nakano E., Nakao M., Nishida S., Nitoh O., Noguchi S., Nozaki T., Ogawa S., Ogawa Y., Ohmi K., Ohshima T., Ohuchi N., Oide K., Okabe T., Okuno S., Olsen S. L., Onuki Y., Ostrowicz W., Ozaki H., Pakhlov P., Park C. W., Park H., Pestotnik R., Piilonen L. E., Poluektov A., Rozanska M., Sakai Y., Schietinger T., Schneider O., Schwanda C., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shidara T., Shwartz B., Sidorov V., Sokolov A., Somov A., Stanic S., Staric M., Stoeck H., Sumisawa K., Sumiyoshi T., Suzuki S., Tajima O., Takasaki F., Tamai K., Tamura N., Tanaka M., Tawada M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Ueno K., Unno Y., Uno S., Usov Y., Varner G., Villa S., Wang C. C., Wang C. H., Watanabe Y., Won E., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Yoshida M., Yusa Y., Zhang L. M., Zhang Z. P., Zhilich V., Zuercher D.

    PHYSICAL REVIEW LETTERS   97 ( 25 )   2006.12( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.97.251802

  • Study of decay mechanisms in B-->Lambda(+)(c)p pi(-) decays and observation of low-mass structure in the Lambda(+)(c)p system Reviewed

    Gabyshev N., Abe K., Abe K., Adachi I., Aihara H., Asano Y., Aulchenko V., Aushev T., Bakich A. M., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi S. -K., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Enari Y., Fratina S., Gershon T., Gokhroo G., Golob B., Gorisek A., Hara T., Hayashii H., Hazumi M., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Hsiung Y. B., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim H. O., Kim S. K., Kim S. M., Kinoshita K., Korpar S., Krokovny P., Kumar S., Kuo C. C., Kuzmin A., Kwon Y. -J., Lange J. S., Leder G., Lesiak T., Lin S. -W., Mandl F., Matsumoto T., Mikami Y., Mitaroff W., Miyake H., Miyata H., Mizuk R., Nagamine T., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Onuki Y., Ozaki H., Palka H., Park C. W., Park H., Parslow N., Peak L. S., Pestotnik R., Piilonen L. E., Rozanska M., Sagawa H., Sakai Y., Sato N., Schietinger T., Schneider O., Schwartz A. J., Senyo K., Seuster R., Sevior M. E., Shibuya H., Sidorov V., Singh J. B., Somov A., Stamen R., Stanic S., Staric M., Sumiyoshi T., Suzuki S. Y., Tajima O., Takasaki F., Tamai K., Tamura N., Tanaka M., Teramoto Y., Tian X. C., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Ueno K., Uno S., Urquijo P., Varner G., Varvell K. E., Villa S., Wang C. H., Wang M. -Z., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamamoto H., Yamashita Y., Yamauchi M., Yang Heyoung, Zhang C. C., Zhang J., Zhang L. M., Zhang Z. P., Zhilich V., Zontar D.

    PHYSICAL REVIEW LETTERS   97 ( 24 )   2006.12( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.97.242001

  • Time-dependent CP asymmetries in B-0 -> K-s(0)pi(0)gamma transitions Reviewed

    Ushiroda Y., Sumisawa K., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Bakich A. M., Barberio E., Barbero M., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Dash M., Eidelman S., Gabyshev N., Gershon T., Go A., Golob B., Ha H., Haba J., Hara K., Hazumi M., Heffernan D., Higuchi T., Hoshi Y., Hou S., Hou W. -S., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim Y. J., Kinoshita K., Krizan P., Kulasiri R., Kumar R., Kuzmin A., Kwon Y. -J., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. -W., Mandl F., Marlow D., Matsumoto T., Matyja A., McOnie S., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ogawa S., Ohshima T., Okuno S., Onuki Y., Ozaki H., Pakhlov P., Park C. W., Park H., Peak L. S., Pestotnik R., Piilonen L. E., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schumann J., Schwartz A. J., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Somov A., Soni N., Staric M., Stoeck H., Suzuki S., Suzuki S. Y., Tajima O., Takasaki F., Tamai K., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Ueno K., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Villa S., Wang C. H., Watanabe Y., Wedd R., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A.

    PHYSICAL REVIEW D   74 ( 11 )   2006.12( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.74.111104

  • Observation of B+→Ξ̄c0Λc+ and evidence for B0→Ξ̄c-Λc+ Reviewed

    R. Chistov, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 11 )   2006.12( ISSN:15507998

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    We report the first observation of the decay B+→Ξ̄c0Λc+ with a significance of 8.7σ and evidence for the decay B0→Ξ̄c-Λc+ with a significance of 3.8σ. The product B(B+→Ξ̄c0Λc+)×B(Ξ̄c0→Ξ̄+π-) is measured to be (4.8-0.9+1.0±1.1±1.2)×10-5, and B(B0→Ξ̄c-Λc+)×B(Ξ̄c-→Ξ̄+π- π-) is measured to be (9.3-2.8+3.7±1.9±2.4)×10-5. The errors are statistical, systematic and the error of the Λc+→pK-π+ branching fraction, respectively. The decay B+→Ξ̄c0Λc+ is the first example of a two-body exclusive B+ decay into two charmed baryons. The data used for this analysis was accumulated at the Υ(4S) resonance, using the Belle detector at the e+e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample is equal to 357fb-1, corresponding to 386×106 BB̄ pairs. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.111105

  • Improved measurements of color-suppressed decays B̄0→D0π0, D0η, D0ω, D*0π0, D*0η and D*0ω Reviewed

    S. Blyth, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 9 )   2006.12( ISSN:15507998

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    We present improved measurements of the branching fractions of the color-suppressed decays B̄0→D(*)0h0, where h0 represents a light neutral meson π0, η or ω. The measurements are based on a data sample of 140fb-1 collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider, corresponding to 7 times the luminosity of the previous Belle measurements. All the measured branching fractions fall in the range 1.4-2.4×10-4, which is significantly higher than theoretical predictions based on naive factorization. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.092002

  • Improved measurements of branching fractions and CP partial rate asymmetries for B→ωK and B→ωπ Reviewed

    C. M. Jen, P. Chang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 11 )   2006.12( ISSN:15507998

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    We report improved measurements of B to pseudoscalar-vector decays containing an ω meson in the final state. Our results are obtained from a data sample that contains 388×106 BB̄ pairs accumulated at the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the following branching fractions: B(B+→ωK+)= [8.1±0.6(stat.)±0.6(syst.)]×10-6, B(B+→ωπ+)= [6.9±0.6(stat.)±0.5(syst.)]×10-6, and B(B0→ωK0)= [4.4-0.7+0.8(stat.)±0.4(syst.)]×10-6. The partial width ratio Γ(B+→ωK+)Γ(B0→ωK0)=1.7±0.3(stat.) ±0.1(sys.). We also set the 90% confidence level upper limit B(B0→ωπ0)<2.0×10-6. In addition, we obtain the partial rate asymmetries ACP=0.05-0.07+0.08(stat.)±0.01(syst.) for B+→ωK+, and ACP=-0.02±0.09(stat.)±0.01(syst.) for B+→ωπ+. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.111101

  • Observation of B+->Lambda(+)(c)Lambda K--(c)+ and B-0 ->Lambda(+)(c)Lambda K--(c)0 decays Reviewed

    Gabyshev N., Abe K., Adachi I., Aihara H., Asano Y., Aulchenko V., Aushev T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Bartel W., Bay A., Bedny I., Bitenc U., Bizjak I., Bondar A., Bozek A., Bracoko M., Browder T. E., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Garmash A., Gershon T., Gokhroo G., Golob B., Haba J., Hayasaka K., Hayashii H., Hazumi M., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Hsiung Y. B., Ikado K., Imoto A., Inami K., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kawasaki T., Khan H. R., Kichimi H., Kim S. M., Korpar S., Krokovny P., Kulasiri R., Kuo C. C., Kuzmin A., Kwon Y. -J., Leder G., Lesiak T., Lin S. -W., Liventsev D., Majumder G., Matsumoto T., Mitaroff W., Miyabayashi K., Miyata H., Miyazaki Y., Mizuk R., Nakano E., Nakao M., Natkaniec Z., Nishida S., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Ozaki H., Palka H., Park C. W., Park K. S., Pestotnik R., Piilonen L. E., Sakai Y., Sato N., Satoyama N., Schietinger T., Schneider O., Schwanda C., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Somov A., Soni N., Stamen R., Stanic S., Staric M., Sumiyoshi T., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Tsukamoto T., Uehara S., Uglov T., Ueno K., Uno S., Urquijo P., Varner G., Varvell K. E., Villa S., Wang C. C., Wang C. H., Watanabe Y., Won E., Xie Q. L., Yamaguchi A., Yamauchi M., Ying J., Zhang Z. P.

    PHYSICAL REVIEW LETTERS   97 ( 20 )   2006.11( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.97.202003

  • Development of a 13-in. Hybrid Avalanche Photo-Detector (HAPD) for a next generation water Cherenkov detector Reviewed

    H. Nakayama, A. Kusaka, H. Kakuno, T. Abe, M. Iwasaki, H. Aihara, M. Shiozawa, M. Tanaka, H. Kyushima, M. Suyama, Y. Kawai

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   567   172 - 175   2006.11( ISSN:01689002

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    We have developed a 13-in. Hybrid Avalanche Photo-Detector (HAPD) for photosensors in next generation water Cherenkov type detectors. We study the performance of the HAPD and the results show good time resolution better than σ = 1 ns, good sensitivity for single photon detection, wide dynamic range, and good uniformity on the photocathode. The HAPD is also expected to be less expensive than large PMTs because of its simpler structure without dynodes. © 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2006.05.219

  • Study of J/ψ→pp̄,ΛΛ̄ and observation of ηc→ΛΛ̄ at Belle Reviewed

    C. H. Wu, M. Z. Wang, et. al. [Belle Collaboation]

    Physical Review Letters   97 ( 16 )   2006.10( ISSN:00319007

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    We study the baryonic charmonium decays of B mesons B+→ηcK+ and B+→J/ψK+, where the ηc and J/ψ subsequently decay into a pp̄ or ΛΛ̄ pair. We measure the J/ψ→pp̄ and ΛΛ̄ anisotropy parameters αB=-0.60±0. 13±0.14 (pp̄), -0.44±0.51±0.31 (ΛΛ̄ ) and compare to results from e+e-→J/ψ formation experiments. We also report the first observation of ηc→ΛΛ̄. The measured branching fraction is B(ηc→ΛΛ̄)=(0.87-0.21+0. 24(stat)-0.14+0.09(syst)±0.27(PDG))×10-3. This study is based on a 357fb-1 data sample recorded on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.97.162003

  • Observation of new states decaying into Λc+K-π+ and Λc+KS0π Reviewed

    R. Chistov, et. al. [Belle Collaboation]

    Physical Review Letters   97 ( 16 )   2006.10( ISSN:00319007

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    We report the first observation of two charmed strange baryons that decay into Λc+K-π+. The broader of the two states is measured to have a mass of 2978.5±2.1±2.0MeV/c2 and a width of 43.5±7.5±7. 0MeV/c2. The mass and width of the narrow state are measured to be 3076.7±0.9±0.5MeV/c2 and 6.2±1.2±0.8MeV/c2, respectively. We also perform a search for the isospin partner states that decay into Λc+KS0π- and observe a significant signal at the mass of 3082.8±1.8±1.5MeV/c2. The data used for this analysis were accumulated at or near the Υ(4S) resonance, using the Belle detector at the e+e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5fb-1. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.97.162001

  • Search for neutrinoless decays τ → ℓ h h and τ → ℓ V0 Reviewed

    Y. Yusa, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   640 ( 4 )   138 - 144   2006.09( ISSN:03702693

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    We have searched for neutrinoless τ lepton decays into ℓhh or ℓ V0, where ℓ stands for an electron or muon, h for a charged light hadron, π or K, and V0 for a neutral vector meson, ρ0, K* (892)0 and φ{symbol}, using a 158 fb-1 data sample collected with the Belle detector at the KEKB e+ e- collider. Since the number of events observed are consistent with the expected background, we set upper limits on the branching fractions in the range of (1.6 - 8.0) × 10-7 for various decay modes at the 90% confidence level. © 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2006.07.025

  • Evidence for B ->eta(')pi and improved measurements for B ->eta ' K Reviewed

    Schumann J., Wang C. H., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Asano Y., Aushev T., Bakich A. M., Balagura V., Barberio E., Barbero M., Bay A., Bedny I., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Browder T. E., Chang M. -C., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Choi Y., Choi Y. K., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Gorisek A., Ha H. C., Haba J., Hara T., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Hsiung Y. B., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim S. K., Kim S. M., Kinoshita K., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lange J. S., Lee J., Lesiak T., Limosani A., Liventsev D., MacNaughton J., Majumder G., Mandl F., Marlow D., Matsumoto T., Matyja A., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nagamine T., Nakamura I., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Palka H., Park C. W., Park H., Parslow N., Peak L. S., Pestotnik R., Piilonen L. E., Rozanska M., Sakai Y., Sarangi T. R., Sato N., Schietinger T., Schneider O., Schwanda C., Seidl R., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Shwartz B., Sidorov V., Sokolov A., Somov A., Soni N., Stamen R., Stanic S., Staric M., Sumisawa K., Suzuki S., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Ueno K., Uno S., Urquijo P., Usov Y., Varner G., Varvell K. E., Villa S., Wang C. C., Wang M. -Z., Watanabe Y., Won E., Xie Q. L., Yamaguchi A., Yamashita Y., Yamauchi M., Ying J., Yusa Y., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Zuercher D.

    PHYSICAL REVIEW LETTERS   97 ( 6 )   2006.08( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.97.061802

  • Measurement of D0→πlν(Klν) form factors and absolute branching fractions Reviewed

    L. Widhalm, et. al. [Belle Collaboation]

    Physical Review Letters   97 ( 6 )   2006.08( ISSN:00319007

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    Using a 282fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider, we study D0 decays to K-+ν and π-+ν final states. The D0 flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q2=(p+pν)2. Normalizing to the total number of D0 tags, we measure the absolute branching fractions to be B(D0→Kν)=(3.45±0.07stat±0.20syst)% and B(D0→πν)=(0.255±0.019stat±0.016syst)% and the semileptonic form factors (within the modified pole model) f+K(0)=0. 695±0.007stat±0.022syst and f+π(0)=0.624±0. 020stat±0.030syst. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.97.061804

  • Search for lepton flavor violating τ- decays with a K<inf>S</inf>0 meson Reviewed

    Y. Miyazaki, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   639 ( 3-4 )   159 - 164   2006.08( ISSN:03702693

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    We have searched for the lepton flavor violating decays τ- → ℓ- KS0 (ℓ = e or μ), using a data sample of 281 fb-1 collected with the Belle detector at the KEKB e+ e- asymmetric-energy collider. No evidence for a signal was found in either of the decay modes, and we set the following upper limits for the branching fractions: B (τ- → e- KS0) < 5.6 × 10-8 and B (τ- → μ- KS0) < 4.9 × 10-8 at the 90% confidence level. These results improve the previously published limits set by the CLEO Collaboration by factors of 16 and 19, respectively. © 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2006.05.086

  • Measurement of the quark mixing parameter cos21 using time-dependent dalitz analysis of B̄0→D[KS0π+π-]h0 Reviewed

    P. Krokovny, et. al. [Belle Collaboation]

    Physical Review Letters   97 ( 8 )   2006.08( ISSN:00319007

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    We present a measurement of the angle 1 of the Cabibbo-Kobayashi-Maskawa unitarity triangle using a time-dependent Dalitz analysis of D→KS0π+π- decays produced in neutral B meson decay to a neutral D meson and a light meson (B̄0→D(*)h0). The method allows a direct extraction of 21 and, therefore, helps to resolve the ambiguity between 21 and π-21 in the measurement of sin21. We obtain sin21=0.78±0.44±0. 22 and cos21=1.87-0.53-0.32+0.40+0.22. The sign of cos21 is determined to be positive at 98.3% C.L. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.97.081801

  • Measurement of branching fraction and direct CP asymmetry in B0→ρ0π0 decays Reviewed

    J. Dragic, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 11 )   2006.07( ISSN:15507998

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    We report a measurement of the branching fraction of the decay B0→ρ0π0, using 386×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We detect 51-13+14 signal events with a significance of 4.2 standard deviations, including systematic uncertainties, and measure the branching fraction to be B(B0→ρ0π0)=(3.12-0.82+0.88(stat)±0.33(syst)-0. 68+0.50(model))×10-6. We also perform the first measurement of direct CP violating asymmetry in this mode. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.73.111105

  • Search for the hc meson in B±→hcK± Reviewed

    F. Fang, T. E. Browder, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 1 )   2006.07( ISSN:15507998

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    We report a search for the hc meson via the decay chain B±→hcK±, hc→ηcγ with ηc→KS0K± π and pp̄. No significant signals are observed. We obtain upper limits on the branching fractions for B±→ηcγK± in bins of the ηcγ invariant mass. The results are based on an analysis of 253fb-1 of data collected by the Belle detector at the KEKB e+e- collider. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.012007

  • Evidence for large direct CP violation in B-+/- -> p(770)K-0(+/-) from analysis of three-body charmless B-+/- -> K-+/-pi(+/-)pi(+/-) decays Reviewed

    Garmash A., Abe K., Abe K., Adachi I., Aihara H., Asano Y., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Barbero M., Bedny I., Bitenc U., Bizjak I., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Chuvikov A., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Gorisek A., Ha H. C., Hara T., Hasegawa Y., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Hsiung Y. B., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kapusta P., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim S. K., Kim S. M., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kulasiri R., Kuo C. C., Kuzmin A., Kwon Y. -J., Lee S. E., Lesiak T., Limosani A., Lin S. -W., Liventsev D., Mandl F., Marlow D., Matsumoto T., Matyja A., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Nagamine T., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Ozaki H., Park C. W., Park H., Park K. S., Peak L. S., Pestotnik R., Piilonen L. E., Rozanska M., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schumann J., Schwanda C., Schwartz A. J., Seidl R., Sevior M. E., Shibuya H., Shwartz B., Singh J. B., Somov A., Stamen R., Stanic S., Staric M., Sumiyoshi T., Suzuki S., Suzuki S. Y., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Uno S., Urquijo P., Varner G., Varvell K. E., Villa S., Wang C. H., Wang M. -Z., Watanabe Y., Won E., Xie Q. L., Yamaguchi A., Yamauchi M., Yang Heyoung, Zhang L. M., Zhang Z. P., Zhilich V., Zuercher D.

    PHYSICAL REVIEW LETTERS   96 ( 25 )   2006.06( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.96.251803

  • Charge asymmetry of same-sign dileptons in B-0-B-0 mixing Reviewed

    Nakano E., Abe K., Abe K., Aihara H., Asano Y., Aushev T., Bakich A. M., Ban Y., Barberio E., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bracko M., Browder T. E., Chen A., Chen W. T., Cheon B. G., Choi Y., Chuvikov A., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Enari Y., Fratina S., Gershon T., Gokhroo G., Golob B., Hara T., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Kang J. H., Kang J. S., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. O., Kim S. K., Kim S. M., Korpar S., Krizan P., Krokovny P., Kumar S., Kuo C. C., Kwon Y. -J., Lange J. S., Leder G., Lesiak T., Li J., Lin S. -W., Liventsev D., Majumder G., Marlow D., Matsumoto T., Matyja A., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mizuk R., Mohapatra D., Mori T., Nagamine T., Nagasaka Y., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Ozaki H., Palka H., Park H., Parslow N., Pestotnik R., Piilonen L. E., Sagawa H., Sakai Y., Sato N., Schietinger T., Schneider O., Sevior M. E., Shibuya H., Sidorov V., Somov A., Stamen R., Stanic S., Staric M., Sumisawa K., Suzuki S. Y., Tajima O., Takasaki F., Tamai K., Tamura N., Tanaka M., Teramoto Y., Tian X. C., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Uno S., Urquijo P., Varvell K. E., Wang C. C., Wang C. H., Watanabe M., Xie Q. L., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Ying J., Zhang J., Zhang L. M., Zhang Z. P., Zhilich V., Zontar D.

    PHYSICAL REVIEW D   73 ( 11 )   2006.06( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.73.112002

  • Observation of b→dγ and determination of |Vtd/Vts| Reviewed

    D. Mohapatra, M. Nakao, S. Nishida, et. al. [Belle Collaboation]

    Physical Review Letters   96 ( 22 )   2006.06( ISSN:00319007

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    We report the observation of the flavor-changing neutral current process b→dγ using a sample of 386×106 B meson pairs accumulated by the Belle detector at the KEKB e+e- collider. We measure branching fractions for the exclusive modes B-→ρ-γ, B̄0→ρ0γ, and B̄0→ωγ. Assuming that these three modes are related by isospin, we find B(B̄→(ρ,ω)γ)=(1.32-0.31+0.34(stat)-0.09+0.10(syst)) ×10-6 with a significance of 5.1σ. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements |Vtd/Vts| to be 0.199-0.025+0.026(exp)-0.015+0.018(theor). © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.96.221601

  • Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at Belle Reviewed

    R. Seidl, K. Hasuko, et. al. [Belle Collaboation]

    Physical Review Letters   96 ( 23 )   2006.06( ISSN:00319007

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    The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark’s momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e+e- annihilation at a center-of-mass energy of 10.52Â.

    DOI: 10.1103/PhysRevLett.96.232002

  • Measurement of the branching fraction, polarization, and CP asymmetry for B0→ρ+ρ- Decays, and determination of the cabibbo-kobayashi-maskawa phase 2 Reviewed

    A. Somov, A. J. Schwartz, et. al. [Belle Collaboation]

    Physical Review Letters   96 ( 17 )   2006.05( ISSN:00319007

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    We have measured the branching fraction B, longitudinal polarization fraction fL, and CP asymmetry coefficients A and S for B0→ρ+ρ- decays with the Belle detector at the KEKB e+e- collider using 253fb-1 of data. We obtain B=[22.8±3.8(stat)-2.6+2.3(syst)]×10-6, fL=0.941-0.040+0.034(stat)±0.030(syst), A=0.00±0.30(stat) ±0.09(syst), and S=0.08±0.41(stat)±0.09(syst). These values are used to constrain the Cabibbo-Kobayashi-Maskawa phase 2; the solution consistent with the standard model is 2=(88±17)° or 59°< 2<115° at 90% C.L. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.96.171801

  • Search for the decay B0→γγ Reviewed

    S. Villa, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 5 )   2006.04( ISSN:15507998

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    The rare decay B0→γγ is searched for in 104fb-1 of data, corresponding to 111×106BB̄ pairs, collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No evidence for the signal is found, and an upper limit of 6.2×10-7 at 90% confidence level is set for the corresponding branching fraction. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.73.051107

  • Improved constraints on D0-D̄0 mixing in D0→K+π- Decays from the Belle detector Reviewed

    L. M. Zhang, Z. P. Zhang, J. Li, et. al. [Belle Collaboation]

    Physical Review Letters   96 ( 15 )   2006.04( ISSN:00319007

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    We report the results of a search for D0-D̄0 mixing in D0→K+π- decays based on 400fb-1 of data accumulated by the Belle detector at KEKB. Both assuming CP conservation and allowing for CP violation, we fit the decay-time distribution for the mixing parameters x′ and y′, as well as for the parameter RD, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays. The 95% confidence level region in the (x′2,y′) plane is obtained using a frequentist method. Assuming CP conservation, we find x′2<0.72×10-3 and -9.9×10-3<y′<6.8×10-3 at the 95% confidence level; these are the most stringent constraints on the mixing parameters to date. The no-mixing point (0,0) has a confidence level of 3.9%. Assuming no mixing, we measure RD=(0.377±0.008±0.005)%. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.96.151801

  • Observation of a chi '(c2) candidate in gamma gamma -> D(D)over-bar production at Belle Reviewed

    Uehara S, Abe K, Abe K, Adachi I, Aihara H, Arinstein K, Asano Y, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Gorisek A, Ha HC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hoshi Y, Hou S, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim SM, Korpar S, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Pakhlov P, Park CW, Park H, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Singh JB, Sokolov A, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Tian XC, Trabelsi K, Tsukamoto T, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamauchi M, Ying J, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V

    PHYSICAL REVIEW LETTERS   96 ( 8 )   2006.03( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.96.082003

  • Study of B±→DCPK± and DCP*K± decays Reviewed

    K. Abe, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 5 )   2006.03( ISSN:15507998

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    We report a study of the modes B±→DK± and B±→D*K± where D(*) decays to CP eigenstates. The data sample used contains 275×106BB̄ events at the Υ(4S) resonance collected by the Belle detector at the KEKB energy-asymmetric e+e- collider. The CP asymmetries obtained for DCPK are: A1=0.06±0.14(stat) ±0.05(sys), A2=-0.12±0.14(stat)±0.05(sys) and for DCP*K: A1*=-0.20±0.22(stat)±0.04(sys), A2*=0.13±0.30(stat)±0.08(sys). © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.73.051106

  • Development of event building farm for SuperKEKB Reviewed

    Ko Itoh, Hiroaki Aihara, Takeo Higuchi, Ryousuke Itoh, Masako Iwasaki, Hidekazu Kakuno, Mikihiko Nakao, Soh Yamagata Suzuki

    IEEE Transactions on Nuclear Science   53   293 - 296   2006.02( ISSN:00189499

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    For the purpose of new physics search in rare B meson decays, an upgrade of the KEKB accelerator is being planned where the luminosity becomes more than ten times higher. The trigger rate with the increased luminosity is expected to reach up to 30 kHz with the event size of ∼300 kB. A new event builder is designed to cope with the condition by modularizing the system currently used in the Belle experiment and by operating multiple units in parallel. A test bench is built to study the new design and results of performance tests are reported. © 2006 IEEE.

    DOI: 10.1109/TNS.2006.869829

  • T2K proton beam handling and failure analysis Reviewed

    M. Iwasaki

    Annual Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2006, and the Annual Fall Meeting of the Japan Particle Physics Community   2006.01

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    Beam line components (magnets, monitors) are under construction / ready for the production Several simulation studies has been done 1. With the current monitor configuration, accuracy of the beam parameter measurements are Δε(x) = 4% Δε(y) = 2% Beam position at the target: 0.2mm(x) 0.2mm(y) Beam size at the target: 0.4mm(x) 0.3mm(y) 2. Estimate the tolerance of the beam line components to deliver the beam core to the target.

  • Measurement of forward-backward asymmetry and Wilson coefficients in Bâ†'K*l+l- Reviewed

    A. Ishikawa, et. al. [Belle Collaboation]

    Physical Review Letters   96 ( 25 )   2006.01( ISSN:00319007

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    We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients A9/A7 and A10/A7 in Bâ†' K*â.,"+â.,"-, where â.," represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4Ï. The results are obtained from a data sample containing 386 106†â€BB pairs that were collected on the Î¥(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.96.251801

  • Precision electroweak measurements on the Z resonance Reviewed

    S. Schael, et. al. [ALEPH, DELPHI, L3, OPAL, and SLD Collaborations, LEP Electroweak Working, SLD Electroweak, and SLD Heavy Flavour Groups]

    Physics Reports   427   257 - 454   2006.01( ISSN:03701573

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    © 2006 Elsevier B.V. All rights reserved. We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, mZ and ΓZ, and its couplings to fermions, for example the ρ parameter and the effective electroweak mixing angle for leptons, are precisely measured: mZ = 91.1875 ± 0.0021 GeV, ΓZ = 2.4952 ± 0.0023 GeV, ρl = 1.0050 ± 0.0010, sin2 θlepteff = 0.23153 ± 0.00016. The number of light neutrino species is determined to be 2.9840 ± 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, mt = 173+13-10 GeV, and the mass of the W boson, mW = 80.363 ± 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of mt and mW, the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level.

    DOI: 10.1016/j.physrep.2005.12.006

  • Observation of a near-threshold D0D̄0π0 enhancement in B→D0D̄0π0K decay Reviewed

    G. Gokhroo, G. Majumder, et. al. [Belle Collaboation]

    Physical Review Letters   97 ( 16 )   2006.01( ISSN:00319007

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    We report the first observation of a near-threshold enhancement in the D0D̄0π0 system from B→D0D̄0π0K decays using a 414fb-1 data sample collected at the Υ(4S) resonance. The enhancement peaks at a mass M=3875.2±0.7-1.6+0.3±0.8MeV/c2 and the branching fraction for events in the peak is B(B→D0D̄0π0K)=(1.22±0.31+0.23-0.30) ×10-4. The data were collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.97.162002

  • Determination of parallel to V-ub parallel to from measurements of the inclusive charmless semileptonic partial rates of B mesons using full reconstruction tags Reviewed International coauthorship

    Bizjak I, ..., Iwasaki M., 他Belle Collaboration

    PHYSICAL REVIEW LETTERS   95 ( 24 )   2005.12( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.95.241801

  • Measurements of B decays to two kaons Reviewed

    Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bakich AM, Balagura V, Banerjee S, Barberio E, Barbero M, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim JH, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kuo CC, Kuzmin A, Kwon YJ, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Moloney GR, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sakai Y, Sato N, Satoyama N, Sayeed K, Schietinger T, Schneider O, Schwartz AJ, Sevior ME, Shibuya H, Sidorov V, Somov A, Soni N, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Varner G, Wang CH, Wang MZ, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zang SL, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zurcher D

    PHYSICAL REVIEW LETTERS   95 ( 23 )   2005.12( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.95.231802

  • Development of large-aperture hybrid photo-detector and readout system Reviewed

    Y. Kawai, H. Nakayama, A. Kusaka, H. Kakuno, T. Abe, M. Iwasaki, H. Aihara, M. Tanaka, M. Shiozawa, H. Kyushima, M. Suyama

    IEEE Nuclear Science Symposium Conference Record   2   776 - 780   2005.12( ISSN:10957863

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    Publishing type:Research paper (scientific journal)  

    We have undertaken the development of a large scale Hybrid Photo-Detector (HPD) and new readout system comprising an ASIC preamplifier, an Analog Memory Cell (AMC) and an FPGA (DSP) which, together, are intended to be the next generation water Cherenkov detector. We have fabricated a 13-inch HPD and have confirmed the S/N of ∼10 and the time resolution better than 1ns (σ) for a single photon level signal. We have made and evaluated the performance of prototypes of a bipolar process charge sensitive ASIC preamplifier and 64-depth AMC to be used in the readout system. © 2005 IEEE.

    DOI: 10.1109/NSSMIC.2005.1596371

  • Improved measurement of the electroweak penguin process B -> X(s)l(+)l(-) Reviewed International coauthorship

    Iwasaki M., Itoh K., Aihara H., 他 Belle Collaboration

    PHYSICAL REVIEW D   72 ( 9 )   092005   2005.11( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.72.092005

  • Search for D-0-(D)over-bar(0) mixing using semileptonic decays at Belle Reviewed

    Bitenc U, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Banerjee S, Barberio E, Barbero M, Bedny I, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Imoto A, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim JH, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kuo CC, Kwon YJ, Lange JS, Leder G, Lee SE, Lesiak T, Li J, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Moloney GR, Nagamine T, Nagasaka Y, Nakano E, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Pakhlov P, Palka H, Park CW, Parslow N, Pestotnik R, Piilonen LE, Sakai Y, Satoyama N, Sayeed K, Schietinger T, Schneider O, Schwartz AJ, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Somov A, Soni N, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Villa S, Wang CH, Wang MZ, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zang SL, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V

    PHYSICAL REVIEW D   72 ( 7 )   2005.10( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.72.071101

  • Time-dependent C P violation effects in partially reconstructed B-0 -> D-*-/+pi(+/-) decays Reviewed

    Gershon T, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich AM, Banerjee S, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Fratina S, Gabyshev N, Garmash A, Gokhroo G, Golob B, Gorisek A, Haba J, Hara K, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kent N, Khan HR, Kichimi H, Kim HJ, Kim SM, Kinoshita K, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Moloney GR, Nagamine T, Nakano E, Nakao M, Nakazawa H, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Pakhlov P, Palka H, Park CW, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Ronga FJ, Sagawa H, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shibata T, Shibuya H, Singh JB, Somov A, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Watanabe M, Xie QL, Yabley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang HY, Ying J, Zhang J, Zhang LM, Zhang ZP, Zontar D

    PHYSICS LETTERS B   624 ( 1-2 )   11 - 21   2005.09( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2005.07.020

  • Improved evidence for direct CP violation in B0 ->pi(+)pi(-) decays and model-independent constraints on phi(2) Reviewed

    Abe K, Adachi I, Aihara H, Arinstein K, Asano Y, Aushev T, Bakich AM, Ban Y, Barberio E, Barbero M, Bay A, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Dash M, Dong LY, Drutskoy A, Eidelman S, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gorisek A, Haba J, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kakuno H, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kibayashi A, Kichimi H, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar S, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, MacNaughton J, Majumder G, Mandl F, Marlow D, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Murakami A, Nagamine T, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Ronga FJ, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Schwartz AJ, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yang HY, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D, Zurcher D

    PHYSICAL REVIEW LETTERS   95 ( 10 )   2005.09( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.95.101801

  • Search for lepton flavor violating decays tau(-) -> l(-) pi(0), l (-) eta, l(-) eta ' Reviewed

    Enari Y, Sato N, Abe K, Abe K, Aihara H, Asano Y, Aulchenko V, Bahinipati S, Bakich AM, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Chang MC, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Dalseno J, Dash M, Drutskoy A, Eidelman S, Epifanov D, Fang F, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Gorisek A, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SM, Korpar S, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Mandl F, Matsumoto T, Mikami Y, Mitaroff W, Miyake H, Miyata H, Mizuk R, Moloney GR, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Parslow N, Peak LS, Piilonen LE, Root N, Sagawa H, Sakai Y, Schietinger T, Schneider O, Schonmeier P, Schumann J, Senyo K, Sevior ME, Shibata T, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Ueno K, Uglov T, Uno S, Urquijo P, Ushiroda Y, Varner G, Villa S, Wang CC, Wang CH, Watanabe M, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICS LETTERS B   622 ( 3-4 )   218 - 228   2005.09( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2005.07.021

  • Observation of B--> J/psi Lambda(p)over-bar and searches for B--> J/psi Sigma(0)(p)over-bar and B-0 -> J/psi p(p)over-bar decays Reviewed

    Xie QL, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich AM, Barberio E, Barbero M, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim JH, Kim SM, Kinoshita K, Krokovny P, Kuo CC, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nagamine T, Nagasaka Y, Nakano E, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Parslow N, Pestotnik R, Piilonen LE, Sakai Y, Satoyama N, Sayeed K, Schneider O, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Somov A, Soni N, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CH, Wang MZ, Watanabe Y, Won E, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yuan Y, Zang SL, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Ziegler T

    PHYSICAL REVIEW D   72 ( 5 )   2005.09( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.72.051105

  • Measurements of the branching fraction and polarization in B+â†Ï+K*0 decays Reviewed

    J. Zhang, et. al. [Belle Collaboation]

    Physical Review Letters   95 ( 14 )   2005.09( ISSN:00319007

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    We present the results of a study of the charmless vector-vector decay B+â†'Ï+K*0, based on 253fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the branching fraction B(B+â†'Ï+K*0)=[8.9±1. 7(stat)±1.2(syst)]Ã-10-6. We also perform a helicity analysis of the Ï and K* vector mesons, and obtain the longitudinal polarization fraction fL(B+â†'Ï+K*0)=0. 43±0.11(stat)-0.02+0.05(syst). © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.95.141801

  • Measurement of the branching fractions for B-→D(*)+π-+ -ν̄ and B0̄→D(*)0π+ -ν̄ and B Reviewed

    D. Liventsev, T. Matsumoto, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   72 ( 5 )   2005.09( ISSN:15507998

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    We report on a measurement of the branching fractions for B-→D(*)+π- -ν̄ and B0̄→D(*)0π+ -ν̄ with 275×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at KEKB. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We obtain B(B-→D+π- -ν̄)=(0.54±0.07(stat)±0.07(syst) ±0.06(BR))×10-2, B(B-→D*+π- -ν̄)=(0. 67±0.11(stat)±0.09(syst)±0.03(BR))×10-2, B(B0̄→D0π+ -ν̄)=(0.33±0.06(stat)±0.06(syst) ±0.03(BR))×10-2, B(B0̄→D*0π+ -ν̄)=(0.65±0.12(stat)±0.08(syst)±0.05(BR)) ×10-2, where the third error comes from the error on B̄→ D(*) -ν̄ decays. Contributions from B0̄→D*+- ν̄ decays are excluded in the measurement of B0̄→D0π+- ν̄. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.72.051109

  • Studies of CP violation in B -> J/psi Kappa(*) decays Reviewed

    Itoh R, Onuki Y, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bakich AM, Ban Y, Barberio E, Bay A, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Dash M, Dong LY, Drutskoy A, Eidelman S, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gorisek A, Haba J, Hara K, Hara T, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar S, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Majumder G, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Nagamine T, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Schwartz AJ, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell KE, Wang CC, Wang CH, Watanabe Y, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   95 ( 9 )   2005.08( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.95.091601

  • Measurement of time-dependent CP-Violating asymmetries in B-0 ->(KsKsKs0)-K-0-K-0 decay Reviewed

    Sumisawa K, Ushiroda Y, Hazumi M, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bakich AM, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gorisek A, Haba J, Hara K, Hara T, Hayashii H, Higuchi T, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lesiak T, Lin SW, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Seuster R, Sevior ME, Shibuya H, Sidorov V, Singh JB, Somov A, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang HY, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   95 ( 6 )   2005.08( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.95.061801

  • Observation of B+-> p(-)Lambda gamma Reviewed

    Lee YJ, Wang MZ, Abe K, Abe K, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gorisek A, Haba J, Hayasaka K, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mizuk R, Moloney GR, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Olsen SL, Ostrowicz W, Ozaki H, Palka H, Park CW, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Root N, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schumann J, Senyo K, Sevior ME, Shibata T, Shibuya H, Shwartz B, Sidorov V, Singh JB, Somov A, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Watanabe M, Xie QL, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang CC, Zhang LM, Zhang ZP, Zhilich V, Zontar D, Zurcher D

    PHYSICAL REVIEW LETTERS   95 ( 6 )   2005.08( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.95.061802

  • Measurement of |V<inf>ub</inf>| near the endpoint of the electron momentum spectrum from semileptonic B-meson decays Reviewed

    A. Limosani, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   621 ( 1-2 )   28 - 40   2005.08( ISSN:03702693

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    We report measurements of partial branching fractions of inclusive charmless semileptonic B-meson decays at the endpoint of the electron momentum spectrum. The measurements are made in six overlapping momentum intervals that have lower bounds ranging from 1.9 to 2.4 GeV/c and a common upper bound of 2.6 GeV/c, as measured in the centre of mass frame. The results are based on a sample of 29 million BB̄ pairs, accumulated by the Belle detector at the KEKB asymmetric e+e- collider operating on the Υ(4S) resonance. In the momentum interval ranging from 1.9 to 2.6 GeV/c we measure the partial branching fraction ΔB(B→Xueνe)=(8.47±0.37±1.53)×10-4, where the first error is statistical and the second is systematic. A prediction of the partial rate R=(21.69±3.62-1.98+2.18)|Vub|2 ps-1 in this momentum interval based on theory is calculated with input HQET parameters that have been derived from Belle's measurement of the B→Xsγ photon energy spectrum, where the first error is due to the uncertainty on HQET parameters and the second error is from theory. Using both ΔB(B→Xueνe) and R we find |V ub|=(5.08±0.47±0.42-0.23+0.26)×10-3, where the first error is from the partial branching fraction, and the second and third errors are from uncertainties in R. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.06.011

  • Measurement of γγ → pp̄ production at Belle Reviewed

    C. C. Kuo, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   621 ( 1-2 )   41 - 55   2005.08( ISSN:03702693

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    A high precision study of the process γγ→pp̄ has been performed using a data sample of 89 fb-1 collected with the Belle detector at the KEKB e+e- collider. The cross section of pp̄ production has been measured at two-photon center-of-mass (c.m.) energies between 2.025 and 4.0 GeV and in the c.m. angular range of |cosθ*|<0.6. Production of γγ→ηc→pp̄ is observed and the product of the two-photon width of the ηc and its branching ratio to pp̄ is determined. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.06.036

  • Evidence for B-0 -> D+D- and observation of B-->(DD-)-D-0 and B-->(DD*-)-D-0 decays Reviewed

    Majumder G, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Banerjee S, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim SM, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, MacNaughton J, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Moloney GR, Nagamine T, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Palka H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Xie QL, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang CC, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   95 ( 4 )   2005.07( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.95.041803

  • Branching fraction, polarization and C P-violating asymmetries in B-0 -> D*D+*(-) decays Reviewed

    Miyake H, Hazumi M, Abe K, Abe K, Aihara H, Asano Y, Aulchenko V, Aushev T, Aziz T, Bahinipati S, Bakich AM, Balagura V, Ban Y, Banerjee S, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Dalseno J, Danilov M, Dash M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Haba J, Hara K, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim JH, Kim SK, Kim SM, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Schwanda C, Schwartz AJ, Senyo K, Seuster R, Sevior ME, Shibuya H, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsukamoto T, Uehara S, Ueno K, Uglov T, Uno S, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe A, Watanabe Y, Yamaguchi A, Yamamoto H, Yamanaka T, Yamashita Y, Yamauchi A, Ying J, Yusa Y, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICS LETTERS B   618 ( 1-4 )   34 - 42   2005.07( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2005.05.052

  • Time-dependent CP-violating asymmetries in b -> s(q)over-barq transitions Reviewed

    Chen KF, Fang F, Garmash A, Hara K, Hazumi M, Higuchi T, Kakuno H, Kusaka A, Shibata T, Tajima O, Trabelsi K, Ziegler T, Abe K, Abe K, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich AM, Ban Y, Barberio E, Barbero M, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Dalseno J, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Gorisek A, Haba J, Hara T, Hayashii H, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Majumder G, Mandl F, Marlow D, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Nagamine T, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Pakhlov P, Palka H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Takasaki F, Tamura N, Tanaka M, Teramoto Y, Tian XC, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW D   72 ( 1 )   2005.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.72.012004

  • Search for the b -> d gamma process Reviewed

    Mohapatra D, Nakao M, Yabsley BD, Abe K, Abe K, Aihara H, Arinstein K, Asano Y, Aushev T, Aziz T, Bahinipati S, Bakich AM, Barberio E, Barbero M, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Gershon T, Gokhroo G, Golob B, Gorisek A, Hara T, Hayasaka K, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kawai H, Kawasaki T, Khan HR, Kim HJ, Kim SM, Kinoshita K, Krizan P, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, Majumder G, Mandl F, Matyja A, Mikami Y, Mitaroff W, Miyata H, Moloney GR, Nagamine T, Nagasaka Y, Nakano E, Nakazawa H, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Park H, Pestotnik R, Piilonen LE, Sakai Y, Sarangi TR, Sato N, Satoyama N, Schietinger T, Schneider O, Schumann J, Schwartz AJ, Senyo K, Sevior ME, Shibuya H, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Villa S, Wang CC, Wang CH, Watanabe Y, Xie QL, Yamashita Y, Yamauchi M, Yang HY, Ying J, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zurcher D

    PHYSICAL REVIEW D   72 ( 1 )   2005.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.72.011101

  • Measurement of masses and branching ratios of Xi(+)(c) and Xi(0)(c) baryons (vol 605, pg 237, 2004) Reviewed

    Lesiak T, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Bahinipati S, Bakich AM, Bay A, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Eiges V, Fratina S, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Haba J, Hayasaka K, Hazumi M, Hinz L, Hoshi Y, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Khan HR, Kinoshita K, Korpar S, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lin SW, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyata H, Moloney GR, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Park H, Park KS, Parslow N, Peak LS, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Semenov S, Shibuya H, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Ying J, Yusa Y, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICS LETTERS B   617 ( 3-4 )   198 - 200   2005.06( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2005.05.014

  • Study of the baryon-antibaryon low-mass enhancements in charmless three-body baryonic B decays Reviewed

    M. Z. Wang, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   617 ( 3-4 )   141 - 149   2005.06( ISSN:03702693

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    The angular distributions of the baryon-antibaryon low-mass enhancements seen in the charmless three-body baryonic B decays B +→pp̄ K +, B 0→pp̄K S0 and B 0→pΛ̄π - are reported. A quark fragmentation interpretation is supported, while the gluonic resonance picture is disfavored. Searches for the Θ + and Θ ++ pentaquarks in the relevant decay modes and possible glueball states G with 2.2 GeV/c 2<M pp̄<2.4 GeV/c 2 in the pp̄ systems give null results. We set upper limits on the products of branching fractions, Β(B 0→Θ +p̄) Β(Θ +→pK S0)<2.3×10 -7, Β(B +→Θ ++p̄) Β(Θ ++→pK +)<9.1×10 -8, and Β(B +→GK +)B(G→pp̄)<4. 1×10 -7 at the 90% confidence level. The analysis is based on a 140 fb -1 data sample recorded on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e +e - collider. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.05.008

  • Measurement of the time-dependent CP-violating asymmetry in BO→KSOπOγ decays Reviewed

    Y. Ushiroda, K. Sumisawa, M. Hazumi, et. al. [Belle Collaboation]

    Physical Review Letters   94 ( 23 )   2005.06( ISSN:00319007

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    We present a new measurement of CP-violation parameters in B0→KS0π0γ decay based on a sample of 275×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One of the B mesons is fully reconstructed in the B0→KS0π0γ decay. The flavor of the accompanying B meson is identified from its decay products. CP-violation parameters are obtained from the asymmetry in the distribution of the proper time intervals between the two B decays. We obtain SKS0π0γ=-0.58-0.38+0.46(stat)±0.11(syst) and AKS0π0γ=+0.03±0.34(stat)±0.11(syst), for the KS0π0 invariant mass covering the full range up to 1.8GeV/c2. We also measure the CP-violation parameters for the case B0→K*0(→KS0π0)γ and obtain SK*0γ=-0.79-0.50+0.63(stat)±0.10(syst) for AK*0γ fixed at 0. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.94.231601

  • Measurement of the branching ratios of the Z0 into heavy quarks Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71   2005.06( ISSN:15507998

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    We measure the hadronic branching ratios of the Z0 boson into heavy quarks: Rb=ΓZ0→bb̄/ΓZ0→hadrons and Rc= ΓZ0→cc̄/ΓZ0→hadrons using a multitag technique. The measurement was performed using about 400000 hadronic Z0 events recorded in the SLC Large Detector experiment at SLAC between 1996 and 1998. The small and stable SLAC Linear Collider beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm hadron decay vertices with high efficiency and purity, which enables us to measure most efficiencies from data. We obtain, Rb=0.21604±0.00098(stat.)±0.00073(syst.)0.00012(Rc) and, Rc=0.1744±0.0031(stat.)±0.0020(syst.)0.0006(Rb). © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.71.112004

  • Measurement of polarization and triple-product correlations in B→K* decays Reviewed

    K. F. Chen, et. al. [Belle Collaboation]

    Physical Review Letters   94 ( 22 )   2005.06( ISSN:00319007

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    We present measurements of decay amplitudes and triple-product correlations in B→K* decays based on 253fb-1 of data recorded at the Υ(4S) resonance with the Belle detector at the KEKB e+e- storage ring. The decay amplitudes for the three different helicity states are determined from the angular distributions of final-state particles. The longitudinal polarization amplitudes are found to be 0.45±0.05±0.02 for B0→K*0 and 0.52±0.08±0.03 for B+→K*+ decays. CP- and T-odd CP-violating triple-product asymmetries are measured to be consistent with zero. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.94.221804

  • Measurement of the branching ratios of the Z(0) into heavy quarks Reviewed

    K Abe, K Abe, T Abe, Adam, I, H Akimoto, D Aston, KG Baird, C Baltay, HR Band, TL Barklow, JM Bauer, G Bellodi, R Berger, G Blaylock, Bogart, JR, GR Bower, JE Brau, M Breidenbach, WM Bugg, D Burke, TH Burnett, PN Burrows, A Calcaterra, R Cassell, A Chou, HO Cohn, JA Coller, MR Convery, Cook, V, RF Cowan, G Crawford, CJS Damerell, M Daoudi, N de Groot, R de Sangro, DN Dong, M Doser, R Dubois, Erofeeva, I, Eschenburg, V, E Etzion, S Fahey, D Falciai, JP Fernandez, K Flood, R Frey, EL Hart, K Hasuko, SS Hertzbach, ME Huffer, Huynh, X, M Iwasaki, DJ Jackson, P Jacques, JA Jaros, ZY Jiang, AS Johnson, Johnson, JR, R Kajikawa, M Kalelkar, HJ Kang, RR Kofler, RS Kroeger, M Langston, DWG Leith, Lia, V, C Lin, G Mancinelli, S Manly, G Mantovani, TW Markiewicz, T Maruyama, AK McKemey, R Messner, KC Moffeit, TB Moore, M Morii, D Muller, Murzin, V, S Narita, U Nauenberg, H Neal, G Nesom, N Oishi, D Onoprienko, LS Osborne, RS Panvini, CH Park, Peruzzi, I, M Piccolo, L Piemontese, RJ Plano, R Prepost, CY Prescott, BN Ratcliff, J Reidy, PL Reinertsen, LS Rochester, PC Rowson, JJ Russell, OH Saxton, T Schalk, BA Schumm, J Schwiening, VV Serbo, G Shapiro, NB Sinev, JA Snyder, H Staengle, A Stahl, P Stamer, H Steiner, D Su, F Suekane, A Sugiyama, A Suzuki, M Swartz, FE Taylor, J Thom, E Torrence, T Usher, J Va'vra, R Verdier, DL Wagner, AP Waite, S Walston, AW Weidemann, ER Weiss, JS Whitaker, SH Williams, S Willocq, RJ Wilson, WJ Wisniewski, JL Wittlin, M Woods, TR Wright, RK Yamamoto, J Yashima, SJ Yellin, CC Young, H Yuta

    AMER PHYSICAL SOC PHYSICAL REVIEW D   71 ( 11 )   2005.06( ISSN:2470-0010

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    We measure the hadronic branching ratios of the Z(0) boson into heavy quarks: R-b=Gamma(0)(Z)(-&gt; b (b) over bar)/Gamma(0)(Z)(-&gt; hadrons) and R-c=Gamma(0)(Z)(-&gt; c (c) over bar)/Gamma(0)(Z)(-&gt; hadrons) using a multitag technique. The measurement was performed using about 400 000 hadronic Z(0) events recorded in the SLC Large Detector experiment at SLAC between 1996 and 1998. The small and stable SLAC Linear Collider beam spot and the CCD-based vertex detector were used to reconstruct bottom and charm hadron decay vertices with high efficiency and purity, which enables us to measure most efficiencies from data. We obtain, R-b=0.21604 +/- 0.00098(stat.)+/- 0.00073(syst.)-/+ 0.00012(R-c) and, R-c=0.1744 +/- 0.0031(stat.)+/- 0.0020(syst.)-/+ 0.0006(R-b).

    DOI: 10.1103/PhysRevD71.112004

  • Dalitz analysis of the three-body charmless decays B+-> K+pi(+)pi(-) and B+-> K+K+K- Reviewed International coauthorship

    Garmash A, ..., Iwasaki M., 他Belle Collaboration

    PHYSICAL REVIEW D   71 ( 9 )   2005.05( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.71.092003

  • Observation of B0→π0π0 Reviewed

    Y. Chao, P. Chang, et. al. [Belle Collaboation]

    Physical Review Letters   94 ( 18 )   2005.05( ISSN:00319007

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    We report the observation of the decay B0→π0π0, using a 253fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e- collider. The measured branching fraction is B(B0→π0π0)= (2.3-0.5-0.3+0.4+0.2)×10-6, with a significance of 5.8 standard deviations including systematic uncertainties. We also make a measurement of the direct CP violating asymmetry in this mode. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.94.181803

  • Observation of a near-threshold ωj/ψ mass enhancement in exclusive B→KωJ/ψ decays Reviewed

    S. K. Choi, S. L. Olsen, et. al. [Belle Collaboation]

    Physical Review Letters   94 ( 18 )   2005.05( ISSN:00319007

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    We report the observation of a near-threshold enhancement in the ωJ/ψ invariant mass distribution for exclusive B→KωJ/ψ decays. The results are obtained from a 253fb-1 data sample that contains 275×106 BB̄ pairs that were collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. The statistical significance of the ωJ/ψ mass enhancement is estimated to be greater than 8σ. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.94.182002

  • Measurements of branching fractions and CP asymmetries in B→ηh decays Reviewed

    P. Chang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 9 )   1 - 6   2005.05( ISSN:15507998

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    We report measurements of B to pseudoscalar-pseudoscalar decays with at least one η meson in the final state using 140fb-1 of data collected by the Belle detector at KEKB e+e- collider. We observe the decay B+→ηπ+ and find evidence of B+→ηK+; the measured branching fractions are B(B+→ηπ+)=(4.8-0.7+0.8(stat)±0.3(sys))×10-6 and B(B+→ηK+)=(2.1±0.6(stat)±0.2(sys))×10-6. Their corresponding CP violating asymmetries are measured to be 0.07±0.15(stat) ±0.03(sys) for ηπ± and -0.49±0.31(stat)±0. 07(sys) for ηK±. No significant signals are found for neutral B→ηh decays. We report the following upper limits on branching fractions at the 90% confidence level: B(B0→ηK0)<2.0×10-6, B(B0→ηπ0)<2.5×10-6 and B(B0→ηη)<2. 0×10-6. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.71.091106

  • Measurement of the γγ → π+π- and γγ → K+K- processes at energies of 2.4-4.1 GeV Reviewed

    H. Nakazawa, S. Uehara, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   615 ( 1-2 )   39 - 49   2005.05( ISSN:03702693

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    We have measured π+π- and K+K - production in two-photon collisions using 87.7fb-1 of data collected with the Belle detector at the asymmetric energy e +e- collider KEKB. The cross sections are measured to high precision in the two-photon center-of-mass energy (W) range between 2.4GeV<W<4.1GeV and angular region |cosθ*|<0.6. The cross section ratio σ(γγ→K+K-)/ σ(γγ→π+π-) is measured to be 0.89±0.04(stat.)±0.15(syst.) in the range of 3.0GeV<W<4. 1GeV, where the ratio is energy-independent. We observe a sin -4θ* behavior of the cross section in the same W range. Production of χc0 and χc2 mesons is observed in both γγ→π+π- and γγ→K+K- modes. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.03.067

  • Search for B0→J/ψD̄0 and B+→J/ψD̄0π+ decays Reviewed

    L. M. Zhang, Z. P. Zhang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 9 )   1 - 6   2005.05( ISSN:15507998

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    We report the results of a search for the decay modes B0→J/ ψD̄0 and B+→J/ψD̄0π+. The analysis is based on 140fb-1 of data accumulated by the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signals are observed and we determine the branching fraction upper limits B(B0→J/ψD̄0)<2.0×10-5 and B(B+→J/ψD̄0π+)<2.5×10-5 at 90% confidence level. These results rule out the explanation of the excess in the low momentum region of the inclusive J/ψ spectrum as intrinsic charm content in the B meson. The branching fractions of the corresponding nonresonant decay channels are also reported. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.71.091107

  • Search for B-0 -> p(p)over-bar, B-0 -> Lambda(Lambda)over-bar, and B+ -> p(Lambda)over-bar at Belle Reviewed

    Chang MC, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich AM, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim SM, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lee YJ, Lesiak T, Li J, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Moloney GR, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Palka H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Peters M, Piilonen LE, Root N, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Ying J, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW D   71 ( 7 )   2005.04( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.71.072007

  • Observation of an isotriplet of excited charmed baryons decaying to Λ <inf>c</inf>+ π Reviewed

    R. Mizuk, et. al. [Belle Collaboation]

    Physical Review Letters   94 ( 12 )   2005.04( ISSN:00319007

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    We report the observation of an isotriplet of excited charmed baryons, decaying into Λ c+ π -, Λ c+ π 0, and Λ c+π +. We measure the mass differences M(Λ c+ π) -M(Λ c+) and widths to be 515.4 -3.1-6.0+3.2+2.1 MeV/c 2, 61 -13-13+18+22 MeV for the neutral state; 505.4 -4.6-2.0+5.8+12.4 MeV/c 2, 62 -23-38+37+52 MeV for the charged state; and 514.5 -3.1-4.9+3.4+2.8 MeV/c 2, 75 -13-11+18+12 MeV for the doubly charged state, where the uncertainties are statistical and systematic, respectively. These results are obtained from a 281 fb -1 data sample collected with the Belle detector near the υ(4S) resonance, at the KEKB asymmetric energy e +e - collider. © 2005 The American Physical Society Nova Gorica Polytechnic, Nova Gorica.

    DOI: 10.1103/PhysRevLett.94.122002

  • Search for τ → eγ decay at Belle Reviewed

    K. Hayasaka, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   613   20 - 28   2005.04( ISSN:03702693

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    We have searched for the lepton-flavor-violating decay τ→eγ using a data sample of 86.7 fb-1 collected with the Belle detector at the KEKB asymmetric e+e- collider. No evidence for a signal is obtained, and we set an upper limit for the branching fraction B(τ→eγ)<3.9×10-7 at the 90% C.L. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.03.028

  • Study of the suppressed decays B-->[K+pi(-)](D)K- and B-->[K+pi(-)](D)pi(-) - art. no. 09160 Reviewed

    Saigo M, Abe K, Abe K, Aihara H, Akatsu M, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Ban Y, Banerjee S, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Haba J, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kent N, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim SM, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyake H, Mizuk R, Mohapatra D, Mori T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Park KS, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Ronga FJ, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Schwartz AJ, Semenov S, Seuster R, Sevior ME, Shibuya H, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Uno S, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe M, Watanabe Y, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yusa Y, Zhang LM, Zhang ZP, Zhilich V, Zontar D, Zurcher D

    PHYSICAL REVIEW LETTERS   94 ( 9 )   2005.03( ISSN:0031-9007

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    DOI: 10.1103/PhyRevLett.94.091601

  • Study of the suppressed decays B - → [K +π -] <inf>D</inf>K - and B - → [K +π -] <inf>D</inf>π - Reviewed

    M. Saigo, et. al. [Belle Collaboation]

    Physical Review Letters   94   2005.03( ISSN:00319007

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    We report a study of the suppressed decays B - → [K +π -] DK - and B - → [K +π -] Dπ -, where [K +π -] D indicates that the K +π - pair originates from a neutral D meson. These decay modes are sensitive to the unitarity triangle angle φ 3. We use a data sample containing 275 × 10 6 BB̄ pairs recorded at the Y(4S) resonance with the Belle detector at the KEKB asymmetric e +e - storage ring. The signal for B - → [K +π -] DK - is not statistically significant, and we set a limit r B < 0.27 at 90% confidence level, where r B is the magnitude of the ratio of amplitudes |A(B - → D̄ 0K -)/A(B - → D 0K -)|. We observe a signal with 6.4σ statistical significance in the related mode, B - → [K +π -] Dπ -. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.94.091601

  • Observation of B+→K+ηγ Reviewed

    S. Nishida, et. al. [Belle Collaboation]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   610 ( 1-2 )   23 - 30   2005.03( ISSN:03702693

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    We report measurements of radiative B decays with Kηγ final states, using a data sample of 253 fb-1 recorded at the Υ(4S) resonance with the Belle detector at the KEKB e+e- storage ring. We observe B+→K+ηγ for the first time with a branching fraction of (8.4±1.5(stat)-0.9+1.2(syst))×10-6 for MKη<2.4 GeV/c2, and find evidence of B0→K 0ηγ. We also search for B→K3*(1780) γ. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.01.097

  • Direct measurements of a<inf>b</inf> and a<inf>c</inf> using vertex and kaon charge tags at the SLAC detector Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   94   2005.03( ISSN:00319007

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    Exploiting the manipulation of the SLAC Linear Collider electron-beam polarization, we present precise direct measurements of the parity-violation parameters Ac and Ab in the Z-boson-c-quark and Z-boson-b-quark coupling. Quark-antiquark discrimination is accomplished via a unique algorithm that takes advantage of the precise SLAC Large Detector charge coupled device vertex detector, employing the net charge of displaced vertices as well as the charge of kaons that emanate from those vertices. From the 1996-1998 sample of 400000 Z decays, produced with an average beam polarization of 73.4%, we find Ac = 0.673 ± 0.029(stat) ± 0.023(syst) and Ab = 0.919 ± 0.018(stat) ± 0.017(syst). © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.94.091801

  • Search for D-0-D-0(-) mixing in D-0 -> K+pi(-) decays and measurement of the doubly-Cabibbo-suppressed decay rate Reviewed

    Li J, Zhang ZP, Schwartz AJ, Abe K, Abe K, Aihara H, Akatsu M, Asano Y, Aushev T, Bakich AM, Bay A, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Haba J, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hokuue T, Hoshi H, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kim JH, Kim SK, Kinoshita K, Krokovny P, Kulasiri R, Kuo CC, Kwon YJ, Lange LS, Leder G, Lee SH, Lesiak T, Limosani A, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nishida S, Nitoh O, Ogawa S, Ohshima T, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Parslow N, Peak LS, Piilonen LE, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Schwanda C, Semenov S, Senyo K, Sevior ME, Shibuya H, Sidorov V, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsuboyama T, Uglov T, Ueno K, Uno S, Varner G, Villa S, Wang CC, Wang CH, Yabsley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yang HY, Ying J, Yuan Y, Yusa Y, Zang SL, Zhang CC, Zhang J, Zhang LM, Zheng Z, Zontar D

    PHYSICAL REVIEW LETTERS   94 ( 7 )   2005.02( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.94.071801

  • Observation of (B)over-bar(0) -> D-sJ(*) (2317)K-+(-) decay Reviewed

    Drutskoy A, Abe K, Abe K, Adachi I, Aihara H, Akatsu M, Asano Y, Aushev T, Bahinipati S, Bakich AM, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Eiges V, Enari Y, Fang F, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Imoto A, Inami K, Ishikawa A, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim JH, Kim SK, Kim SM, Kinoshita K, Koppenburg P, Krizan P, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Lesiak T, Li J, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Parslow N, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schonmeier P, Schumann J, Schwartz AJ, Semenov S, Senyo K, Seuster R, Shibuya H, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe M, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang CC, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   94 ( 6 )   2005.02( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.94.061802

  • Measurement of the branching fraction and CP asymmetry in B+->rho(+)pi(0) Reviewed

    Zhang J, Abe K, Abe K, Abe T, Aihara H, Asano Y, Aulchenko V, Aushev T, Aziz T, Bahinipati S, Bakich AM, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Danilov M, Dash M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim JH, Kim TH, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kumar S, Kuzmin A, Kwon YJ, Leder G, Lee SE, Lee SH, Lesiak T, Li J, Limosani A, Lin SW, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakao M, Nishida S, Nitoh O, Nozaki T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Park CW, Park H, Parslow N, Piilonen LE, Ronga FJ, Rozanska M, Sagawa H, Sakai Y, Sarangi TR, Schneider O, Schumann J, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe M, Watanabe Y, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yang HY, Ying J, Yusa Y, Zang SL, Zhang CC, Zhang ZP, Zhilich V, Ziegler T, Zontar D

    PHYSICAL REVIEW LETTERS   94 ( 3 )   2005.01( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.94.031801

  • Measurement of masses and branching ratios of Xi(+)(c) and Xi(0)(c) baryons Reviewed

    Lesiak T, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Bahinipati S, Bakich AM, Bay A, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Eiges V, Fratina S, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Haba J, Hayasaka K, Hazumi M, Hinz L, Hoshi Y, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Khan HR, Kinoshita K, Korpar S, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lin SW, MacNaughton J, Majumder G, Mandl E, Matsumoto T, Matyja A, Mitaroff W, Miyata H, Moloney GR, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Park H, Park KS, Parslow N, Peak LS, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Semenov S, Shibuya H, Somov A, Soni N, Stamen R, Stani S, Staric M, Sumiyoshi T, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Ying J, Yusa Y, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICS LETTERS B   605 ( 3-4 )   237 - 246   2005.01( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2004.11.038

  • Detector concepts Reviewed

    Gerald Aarons, Toshinori Abe, Jason Abernathy, Medina Ablikim, Halina Abramowicz, David Adey, Catherine Adloff, Chris Adolphsen, Konstantin Afanaciev, Ilya Agapov, Jung Keun Ahn, Hiroaki Aihara, Mitsuo Akemoto, Maria Del CarmenAlabau, Justin Albert, Hartwig Albrecht, Michael Albrecht, David Alesini, Gideon Alexander, Jim Alexander, Wade Allison, John Amann, Ramila Amirikas, Qi An, Shozo Anami, B. Ananthanarayan, Terry Anderson, Ladislav Andricek, Marc Anduze, Michael Anerella, Nikolai Anfimov, Deepa Angal-Kalinin, Sergei Antipov, Claire Antoine, Mayumi Aoki, Atsushi Aoza, Steve Aplin, Rob Appleby, Yasuo Arai, Sakae Araki, Tug Arkan, Ned Arnold, Ray Arnold, Richard Arnowitt, Xavier Artru, Kunal Arya, Alexander Aryshev, Eri Asakawa, Fred Asiri, David Asner, Muzaffer Atac, Grigor Atoian, David Attié, Jean Eudes Augustin, David B. Augustine, Bradley Ayres, Tariq Aziz, Derek Baars, Frederique Badaud, Nigel Baddams, Jonathan Bagger, Sha Bai, David Bailey, Ian R. Bailey, David Baker, Nikolai I. Balalykin, Juan Pablo Balbuena, Jean Luc Baldy, Markus Ball, Maurice Ball, Alessandro Ballestrero, Jamie Ballin, Charles Baltay, Philip Bambade, Syuichi Ban, Henry Band, Karl Bane, Bakul Banerjee, Serena Barbanotti, Daniele Barbareschi, Angela Barbaro-Galtieri, Desmond P. Barber, Mauricio Barbi, Dmitri Y. Bardin, Barry Barish, Timothy L. Barklow, Roger Barlow, Virgil E. Barnes, Maura Barone, Christoph Bartels, Valeria Bartsch, Rahul Basu, Marco Battaglia, Yuri Batygin, Jerome Baudot, Ulrich Baur, D. Elwyn Baynham, Carl Beard, Chris Bebek, Philip Bechtle

    LCWS 2005 - 2005 International Linear Collider Workshop   2005.01

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  • Development of large-aperture Hybrid Photo-Detector and readout system Reviewed

    Y. Kawai, H. Nakayama, A. Kusaka, H. Kakuno, T. Abe, M. Iwasaki, H. Aihara, M. Tanaka, M. Shiozawa, H. Kyushima, M. Suyama

    IEEE 2005 IEEE Nuclear Science Symposium Conference Record, Vols 1-5   776 - 780   2005( ISSN:1082-3654

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    We have undertaken the development of a large scale Hybrid Photo-Detector (HPD) and new readout system comprising an ASIC preamplifier, an Analog Memory Cell (AMC) and an FPGA (DSP) which, together, are intended to be the next generation water Cherenkov detector. We have fabricated a 13-inch HPD and have confirmed the S/N of similar to 10 and the time resolution better than Ins (a) for a single photon level signal. We have made and evaluated the performance of prototypes of a bipolar process charge sensitive ASIC preamplifier and 64-depth AMC to be used in the readout system.

  • Study of time-dependent CP violation in B-0 -> J/psi pi(0) decays Reviewed

    Kataoka SU, Abe K, Abe K, Adachi I, Aihara H, Akatsu M, Asano Y, Aushev T, Bahinipati S, Bakich AM, Bay A, Bedny I, Bitenc U, Bizjak I, Bondar A, Bracko M, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi Y, Danilov M, Dash M, Dong LY, Dragic J, Eidelman S, Eiges V, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Haba J, Hara K, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kim HJ, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SE, Lee SH, Lesiak T, Li J, Lin SW, MacNaughton J, Mandl F, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Peak LS, Piilonen LE, Ronga FJ, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schumann J, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibata T, Shibuya H, Singh JB, Somov A, Soni N, Stamen R, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Trabelsi K, Tsukamoto T, Ueno K, Uno S, Varner G, Villa S, Wang CC, Wang CH, Watanabe M, Yabsley BD, Yamaguchi A, Yamashita Y, Yang H, Ying J, Yuan Y, Zang SL, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Ziegler T, Zontar D

    PHYSICAL REVIEW LETTERS   93 ( 26 )   2004.12( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.93.261801

  • R&amp;D of residual gas beam profile monitor Reviewed

    Ryosuke Ishida, Yu Nakahama, Hiroaki Aihara, Masako Iwasaki, Hidekazu Kakuno, Hiroyuki Noumi, Yoshinori Sato, Akihisa Toyoda

    IEEE Nuclear Science Symposium Conference Record   3   1798 - 1802   2004.12( ISSN:10957863

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    We have studied the Residual Gas Beam Profile Monitor (RGBPM) for the J-PARC neutrino beamline, here the Micro Channel Plate (MCP) is used as a read out device. We carried out the beam tests at the KEK-PS beamline to study the basic performance of the monitor. To check the capability of beam-profile measurement, we studied the properties of signal timing and the effect of electric field produced by the proton beam. We found that the ion collection is effective to avoid the beam induced background in a high beam background environment, and RGBPM works under the electric field produced by the beam itself of less than 20kV/m. In addition, the gain calibration method of MCP has been developed using thermal electrons from the glowing wire. We found the gain of MCP is calibrated with an accuracy of better than 5%. © 2004 IEEE.

  • Observation of B-0 -> D*-(5 pi)(+), B+ -> D*-(4 pi)(++) and B+ -> (D)over-bar(*0)(5 pi)(+) Reviewed

    Majumder G, Abe K, Abe K, Adachi I, Aihara H, Akatsu M, Asano Y, Aziz T, Bahinipati S, Bakich AM, Bartel W, Bay A, Bedny I, Bitenc U, Bizjak I, Bozek A, Brodzicka J, Browder TE, Chao Y, Chen WT, Cheon BG, Chistov R, Choi SK, Chuvikov A, Cole S, Danilov M, Dash M, Eidelman S, Eiges V, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Haba J, Hayasaka K, Hazumi M, Hoshi Y, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Katayama N, Kawasaki T, Khan HR, Kim HJ, Kinoshita K, Krizan P, Krokovny P, Kumar S, Kuo CC, Kwon YJ, Lange JS, Leder G, Lesiak T, Lin SW, MacNaughton J, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mohapatra D, Nagasaka Y, Nakadaira T, Nakao M, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Park H, Park KS, Parslow N, Piilonen LE, Sakai Y, Sato N, Schietinger T, Schneider O, Schumann J, Semenov S, Senyo K, Shibuya H, Singh JB, Somov A, Soni N, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Villa S, Wang CC, Wang CH, Yabsley BD, Yamaguchi A, Yamashita Y, Ying J, Zhang LM, Zhang ZP, Zontar D

    PHYSICAL REVIEW D   70 ( 11 )   2004.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.70.111103

  • Production of π+, π-, K+, K -, p, and p̄ in light (uds), c, and b jets from Z0 decays Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D   69   26   2004.12( ISSN:05562821

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    We present improved measurements of the differential production rates of stable charged particles in hadronic Z0 decays, and of charged pions, kaons, and protons identified over a wide momentum range using the SLD Cherenkov ring imaging detector. In addition to flavor-inclusive Z0 decays, measurements are made for Z0 decays into light (u, d, s), c, and b primary flavors, selected using the upgraded vertex detector. Large differences between the flavors are observed that are qualitatively consistent with expectations based upon previously measured production and decay properties of heavy hadrons. These results are used to test the predictions of QCD in the modified leading logarithm approximation, with the ansatz of local parton-hadron duality, and the predictions of three models of the hadronization process. The light-flavor results provide improved tests of these predictions; the heavy-flavor results provide complementary model tests. In addition we have compared hadron and antihadron production in light quark (as opposed to antiquark) jets. Differences are observed at high momentum for all three charged hadron species, providing direct probes of leading particle effects, and stringent constraints on models. © 2004 The American Physical Society.

    DOI: 10.1103/PhysRevD.69.072003

  • Development of event building farm for SuperKEKB Reviewed

    Ko Ito, Hiroaki Aiahra, Takeo Higuchi, Ryousuke Itoh, Masako Iwasaki, Hidekazu Kakuno, Mikihiko Nakao, Soh Yamagata Suzuki

    IEEE Nuclear Science Symposium Conference Record   2   1319 - 1323   2004.12( ISSN:1095-7863

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    In order to search new physics beyond the Standard Model using B meson decays, we are planning SuperKEKB with a luminosity of 5 × 1035 cm-2 s-1. To tolerate a high trigger rate of 10-30 kHz and to handle a large number of unified readout modules, we design a new event building farm. In order to validate the design, we have set up a prototype event building farm for SuperKEKB and measured the performance. The prototype of readout part works with at least 10 kHz event rate. For a design value, we fine that the further software improvement and the faster PC are needed. Event distribution part of the prototype tolerates the high event rate by increasing the number of event builder units. We conclude that the developed event building farm tolerates the high rate by adding event building units to keep up with gradual increase in luminosity. © 2004 IEEE.

  • Observation of B+ -> Lambda(Lambda)over-barK(+) Reviewed

    Lee YJ, Wang MZ, Abe K, Abe K, Abe T, Aihara H, Asano Y, Aulchenko V, Aushev T, Aziz T, Bahinipati S, Bakich AM, Ban Y, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Guo R, Haba J, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim JH, Kim SK, Koppenburg P, Korpar S, Krokovny P, Kuzmin A, Kwon YJ, Lee SH, Lesiak T, Li J, Lin SW, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyata H, Mizuk R, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakao M, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Parslow N, Piilonen LE, Sagawa H, Saitoh S, Sakai Y, Sato N, Schneider O, Schumann J, Semenov S, Senyo K, Sevior ME, Shibuya H, Sidorov V, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tovey SN, Tsuboyama T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Varvell KE, Wang CH, Watanabe M, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yuan Y, Yusa Y, Zang SL, Zhang CC, Zhang J, Zhang ZP, Ziegler T, Zontar D

    PHYSICAL REVIEW LETTERS   93 ( 21 )   2004.11( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.93.211801

  • Search for CP violation in the decay B-0 ->(DD -/+)-D-*+/- Reviewed

    Aushev T, Iwasaki Y, Abe K, Abe K, Adachi I, Aihara H, Akatsu M, Asano Y, Aziz T, Bahinipati S, Bakich AM, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Danilov M, Dash M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Hastings NC, Hayasaka K, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kim HJ, Kim SK, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Lesiak T, Li J, Lin SW, Liventsev D, MacNaughton J, Mandl F, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Peak LS, Piilonen LE, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schumann J, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Somov A, Soni N, Stamen R, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Yabsley BD, Yamaguchi A, Yamashita Y, Ying J, Yuan Y, Zang SL, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   93 ( 20 )   2004.11( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.93.201802

  • Evidence for direct CP violation in B-0 -> K+pi(-) decays Reviewed

    Chao Y, Chang P, Abe K, Abe K, Abe N, Adachi I, Aihara H, Akai K, Akatsu M, Akemoto M, Asano Y, Aso T, Aulchenko V, Aushev T, Aziz T, Bahinipati S, Bakich AM, Ban Y, Barbero M, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Danilov M, Dash M, Dong LY, Dowd R, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Epifanov D, Everton CW, Fang F, Flanagan J, Fratina S, Fujii H, Funakoshi Y, Furukawa K, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Perdekamp MG, Guler H, Guo R, Haba J, Hagner C, Handa F, Hara K, Hara T, Hastings NC, Hasuko K, Hayasaka K, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hinz L, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou S, Hou WS, Hsiung YB, Huang HC, Igaki T, Igarashi Y, Iijima T, Ikeda H, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh K, Itoh R, Iwamoto M, Iwasaki M, Iwasaki Y, Kagan R, Kakuno H, Kamitani T, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kent N, Khan HR, Kibayashi A, Kichimi H, Kikuchi M, Kikutani E, Kim HJ, Kim HO, Kim H, Kim JH, Kim SK, Kim TH, Kinoshita K, Kobayashi S, Koiso H, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kubo T, Kulasiri R, Kumar S, Kuo CC, Kurashiro H, Kurihara E, Kusaka A, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SE, Lee SH, Lee YJ, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Masuzawa M, Matsuishi T, Matsumoto H, Matsumoto S, Matsumoto T, Matyja A, Michizono S, Mikami Y, Mimashi T, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Mizuk R, Mohapatra D, Moloney GR, Moorhead GF, Mori T, Mueller J, Murakami A, Nagamine T, Nagasaka Y, Nakadaira T, Nakamura I, Nakamura TT, Nakano E, Nakao M, Nakayama H, Nakazawa H, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa A, Ogawa S, Ogawa Y, Ohmi K, Ohnishi Y, Ohshima T, Ohuchi N, Oide K, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Parslow N, Peak LS, Pernicka M, Perroud JP, Peters M, Piilonen LE, Poluektov A, Ronga FJ, Root N, Rozanska M, Sagawa H, Saigo M, Saitoh S, Sakai Y, Sakamoto H, Sakaue H, Sarangi TR, Satapathy M, Sato N, Schietinger T, Schneider O, Schumann J, Schwanda C, Schwartz AJ, Seki T, Semenov S, Senyo K, Settai Y, Seuster R, Sevior ME, Shibata T, Shibuya H, Shidara T, Shwartz B, Sidorov V, Siegle V, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sugahara R, Sugi A, Sugimura T, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Swain SK, Tajima O, Takasaki F, Tamai K, Tamura N, Tanabe K, Tanaka M, Tawada M, Taylor GN, Teramoto Y, Tian XC, Tokuda S, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uchida K, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe M, Watanabe Y, Widhalm L, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamamoto N, Yamamoto S, Yamanaka T, Yamashita Y, Yamauchi M, Yang H, Yeh P, Ying J, Yoshida K, Yoshida M, Yuan Y, Yusa Y, Yuta H, Zang SL, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zheng Y, Zhilich V, Ziegler T, Zontar D, Zurcher D

    PHYSICAL REVIEW LETTERS   93 ( 19 )   2004.11( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.93.191802

  • Observation of the decays B-0 -> K+pi(-)pi(0) and B-0 -> p(-)K(+) Reviewed

    Chang P, Abe K, Abe K, Abe T, Aihara H, Asano Y, Aulchenko V, Aushev T, Aziz T, Bahinipati S, Bakich AM, Ban Y, Bay A, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Cole S, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Guo R, Hastings NC, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Huang HC, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim JH, Kim SK, Kim TH, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kuzmin A, Kwon YJ, Lee SE, Lesiak T, Li J, Lin SW, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Park H, Parslow N, Peak LS, Piilonen LE, Poluektov A, Root N, Rozanska M, Sagawa H, Sakai Y, Schneider O, Schumann J, Semenov S, Senyo K, Sevior ME, Shibuya H, Sidorov V, Somov A, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tsukamoto T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe M, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang CC, Zhang J, Zhang ZP, Zontar D

    PHYSICS LETTERS B   599 ( 3-4 )   148 - 158   2004.10( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2004.07.063

  • Study of double charmonium production in e(+)e(-) annihilation at root s approximate to 10.6 GeV Reviewed

    Abe K, Abe K, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Ban Y, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Danilov M, Dash M, Dong LY, Eidelman S, Eiges V, Fang F, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Guo R, Haba J, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Khan HR, Kim HJ, Koppenburg P, Krizan P, Krokovny P, Kumar S, Kwon YJ, Lange JS, Leder G, Lesiak T, Li J, Lin SW, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mizuk R, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Parslow N, Peak LS, Piilonen LE, Sagawa H, Sakai Y, Sato N, Schneider O, Schumann J, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Sidorov V, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Varvell KE, Wang CC, Wang CH, Watanabe M, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Zang SL, Zhang CC, Zhang J, Zhang ZP, Zontar D

    PHYSICAL REVIEW D   70 ( 7 )   2004.10( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.70.071102

  • Evidence for B+->omega l(+)nu Reviewed

    Schwanda C, Abe K, Abe K, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aushev T, Bahinipati S, Bakich AM, Ban Y, Banas E, Bay A, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chao Y, Cheon BG, Choi Y, Choi YK, Chuvikov A, Cole S, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Gabyshev N, Gershon T, Gokhroo G, Golob B, Hazumi M, Higuchi I, Hinz L, Hokuue T, Hoshi Y, Hou WS, Huang HC, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kichimi H, Kim HJ, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kumar S, Kwon YJ, Lange JS, Leder G, Lee SH, Lesiak T, Li J, Limosani A, Lin SW, MacNaughton J, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyake H, Miyata H, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Parslow N, Peak LS, Piilonen LE, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Schneider O, Schumann J, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Singh JB, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tomura T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Varvell KE, Wang CC, Wang CH, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yanai H, Ying J, Zhang ZP, Zontar D, Zurcher D

    PHYSICAL REVIEW LETTERS   93 ( 13 )   2004.09( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.93.131803

  • Evidence for B-0 ->rho(0)pi(0) Reviewed

    Dragic J, Gershon T, Abe K, Abe K, Abe T, Aihara H, Asano Y, Aulchenko V, Aushev T, Aziz T, Bakich AM, Banas E, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dong LY, Dowd R, Eidelman S, Eiges V, Enari Y, Epifanov D, Fratina S, Gabyshev N, Gokhroo G, Golob B, Gordon A, Haba J, Hastings NC, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Kang JH, Kang JS, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim JH, Kim SK, Koppenburg P, Korpar S, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lee SE, Lee SH, Lesiak T, Li J, Limosani A, Lin SW, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mohapatra D, Moloney GR, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Park CW, Park H, Parslow N, Peak LS, Piilonen LE, Poluektov A, Ronga FJ, Rozanska M, Sagawa H, Sakai Y, Sarangi TR, Schneider O, Schumann J, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Tajima O, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe M, Watanabe Y, Yabsley BD, Yamada Y, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang HY, Ying J, Zhang J, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   93 ( 13 )   2004.09( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.93.131802

  • Inclusive measurement of the photon energy spectrum in b → sγ decays Reviewed

    P. Koppenburg, et. al. [Belle Collaboation]

    Physical Review Letters   93 ( 6 )   2004.08( ISSN:00319007

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    A fully inclusive measurement of the flavor changing neutral current decay b → sγ was discussed. The first and second moments of the photon energy spectrum above 1.8 GeV were also measured. It was found that the errors were statistical and systematic in nature. The results show that the moments measurement of the spectrum allows the determination of the b-quark mass and of its motion.

    DOI: 10.1103/PhysRevLett.93.061803

  • Search for the Lepton-Flavor-Violating Decay τ- → μ-η at Belle Reviewed

    Y. Enari, et. al. [Belle Collaboation]

    Physical Review Letters   93 ( 8 )   2004.08( ISSN:00319007

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    The lepton flavor violating decay τS-S → μ-η was investigated using data sample of 84.3 fb-1 accumulated with the Belle detector at KEK. The detection of η meson was observed through the decay modes of η→γγ and π+π -π0. The minimum photon energy requirement was reduced from 0.1 to 0.005 GeV, as photons from this decay were found to have softer energy distribution compared to those in η→γγ. The results show that an upper limit for branching fraction B < 3.4×10-7 at about 90% confidence level.

    DOI: 10.1103/PhysRevLett.93.081803

  • Observation of B+->psi(3770)K Reviewed

    Chistov R, Abe K, Abe K, Abe T, Aihara H, Akatsu M, Asano Y, Aushev T, Bakich AM, Ban Y, Banerjee S, Bay A, Bedny I, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen KF, Cheon BG, Choi Y, Choi YK, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Epifanov D, Gabyshev N, Garmash A, Gershon T, Golob B, Guo R, Haba J, Hara T, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou WS, Huang HC, Iijima T, Inami K, Ishikawa A, Iwasaki H, Iwasaki M, Kagan R, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim SK, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto H, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Moloney GR, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Palka H, Park H, Parslow N, Piilonen LE, Sagawa H, Sakai Y, Sarangi TR, Schneider O, Schwartz AJ, Semenov S, Sevior ME, Shwartz B, Sidorov V, Stamen R, Stanic S, Staric M, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Wang CC, Wang CH, Wang MZ, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang CC, Zhang ZP, Zhilich V, Zontar D, Zurcher D

    PHYSICAL REVIEW LETTERS   93 ( 5 )   2004.07( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.93.051803

  • Study of CP violating effects in time dependent B0(B̄ 0) → D(*) π± decays Reviewed

    T. R. Sarangi, et. al. [Belle Collaboation]

    Physical Review Letters   93   2004.07( ISSN:00319007

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    The measurements of time-dependent decay rates for B 0(B̄0) → D(*)∓π ∓ decays and extraction of CP violation parameters containing φ3 were discussed. It was found that a 140 fb-1 data sample, which contained 152 × 106 BB̄ events, was used in the measurement. Charged leptons, pions and kaons were used to identify the flavor of the accompanying B meson. The results show that |2R D*π sin(2φ1 + φ3)| = 0.060 ± 0.040(stat) ± 0.019(syst) can be obtained.

    DOI: 10.1103/PhysRevLett.93.031802

  • Observation of large CP violation and evidence for direct CP violation in B0 → π+ π- decays Reviewed

    K. Abe, et. al. [Belle Collaboation]

    Physical Review Letters   93 ( 2 )   2004.07( ISSN:00319007

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    The CP violation parameters in Bo → π +π- decay were investigated. The flavor of the accompanying B meson was identified by reconstructing B o→π+π- CP eigenstate. It was observed that the expected sensitivity was optimized using the ratio LR. The study showed that there was a direct CP violation with a significance at or greater than 3.2σ.

    DOI: 10.1103/PhysRevLett.93.021601

  • Measurement of the CP asymmetry in B → Xsγ Reviewed

    S. Nishida, et. al. [Belle Collaboation]

    Physical Review Letters   93 ( 3 )   2004.07( ISSN:00319007

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    The CP asymmetry in the B → Xsγ, where hadronic recoil system Xs is reconstructed, was investigated using pseudoreconstruction technique. Negligible contamination from b → dγ decays was observed, which were expected to have larger CP asymmetry. The qq̄ and BB̄ distributions were obtained from off-resonance data and Monte Carlo (MC) simulation. The results show that 50% error is assigned to Gaussian width and to ratio of the Gaussian and ARGUS function for rare B decays.

    DOI: 10.1103/PhysRevLett.93.031803

  • Measurement of the branching fractions for B → ωK and B → ωπ Reviewed

    C. H. Wang, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70 ( 1 )   6   2004.07( ISSN:05562821

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    We report improved measurements of branching fractions for charmless hadronic two-body B meson decays containing an ω meson in the final state. The results are based on a data sample of 78 fb -1 collected on the Y(4S) resonance by the Belle detector. We measure the branching fractions B(B + → ωK +)=(6.5 -1.2+1.3±0.6) × 10 -6 and B(B +→ωπ +=(5.7 -1.3+1.4±0.6)×10 -6. We give 90% confidence upper limits for B(B 0→ωK 0) ≤7.6×10 -6 and B(B 0→ωπ 0)<1. 9×10 -6. We also obtain the partial rate asymmetries A CP=0.06 -0.18+0.21 ±0.01 for B ±→ωK ± and A CP=0. 50 -0.20+0.23±0.02 for B ±→ωπ ±.

    DOI: 10.1103/PhysRevD.70.012001

  • Search for neutrinoless decays iota -> 3l Reviewed

    Yusa Y, Nagamine T, Yamaguchi A, Abe K, Abe K, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Banas E, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Cheon BG, Chistov R, Choi Y, Chuvikov A, Danilov M, Dong LY, Eidelman S, Eiges V, Enari Y, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Haba J, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou WS, Iijima I, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HO, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kuzmin A, Kwon YJ, Lee SH, Lesiak T, Li J, Lin SW, MacNaughton J, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyata H, Mohapatra D, Moloney GR, Mori T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Park KS, Parslow N, Perroud JP, Piilonen LE, Poluektov A, Root N, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Schneider O, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Singh JB, Soni N, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki R, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Varner G, Wang CC, Wang CH, Yamada Y, Yamashita Y, Yamauchi M, Yanai H, Zhang J, Zhang ZP, Zhilich V, Ziegler T, Zontar D

    PHYSICS LETTERS B   589 ( 3-4 )   103 - 110   2004.06( ISSN:0370-2693

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    DOI: 10.1016/j.physletb.2004.04.002

  • Measurement of the B -> K*gamma branching fractions and asymmetries Reviewed

    Nakao M, Abe K, Abe K, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Ban Y, Bay A, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Danilov M, Dash M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki M, Kang JH, Kang JS, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim JH, Kim SK, Kim TH, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Lesiak T, Li J, Limosani A, Lin SW, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakazawa H, Neichi K, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Pakhlov P, Palka H, Park H, Parslow N, Peak LS, Piilonen LE, Ronga FJ, Rozanska M, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Schneider O, Schumann J, Schwanda C, Schwartz AJ, Semenov S, Senyo K, Seuster R, Sevior ME, Shwartz B, Singh JB, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Uno S, Ushiroda Y, Varner G, Varvell KE, Wang CC, Wang CH, Wang MZ, Watanabe M, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yang HY, Ying J, Yusa Y, Zhang CC, Zhang J, Zhang ZP, Zhilich V, Ziegler T, Zontar D

    PHYSICAL REVIEW D   69 ( 11 )   2004.06( ISSN:0556-2821

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    DOI: 10.1103/PhysRevD.69.112001

  • Upper bound on the decay τ μγ from the Belle detector Reviewed

    K. Abe, et. al. [Belle Collaboation]

    Physical Review Letters   92 ( 17 )   2004.04( ISSN:00319007

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    A study using 86.3 fb-1 of data collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric e+e - collider was presented. An event composed of exactly two oppositely charged tracks and one photon candidate, that is consistent with a τ+τ- event in which one τ decays to μγ and the other τ decys to a non muon charged particle, neutrinos and any number of γs was searched for. The selection criteria were determined by examining Monte Carlo simulations for signal τpair decay and background events. It was also assumed that the two body decay τ→μγ had a uniform angular distribution in the τ's rest system.

    DOI: 10.1103/PhysRevLett.92.171802

  • Observation of B+ → pp̄π+, B0 → pp̄K0, and B+ → pp̄K*+ Reviewed

    M. Z. Wang, et. al. [Belle Collaboation]

    Physical Review Letters   92 ( 13 )   2004.04( ISSN:00319007

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    The observation of B+ → pp̄π+, which is dominated by the b→u tree diagram was studied. The observation of B 0 → pp̄K0 and B+→pp̄K *+ was also presented and the mesurement of B +→pp̄K+ was improved. It was found that a search for the B0→pp̄K*0 mode yielded only an upper limit. The pp̄ mass spectra was also studied to see if the threshold peaking confirmed with the newly observed modes.

    DOI: 10.1103/PhysRevLett.92.131801

  • Search for the Radiative Decays B → ργ and B0 → ωγ Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   92   2004.03( ISSN:00319007

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    The radiative decays B → ργ and B0 → ωγ were studied. Charge-particle trajectories were measured in both a five-layer silicon vertex tracker (SCT) and 40-layer drift chamber (DCH). A ring-imaging Cherenkov detector (DIRC) was used for charged-particle identification. The 90% C.L. upper limits on the branching fractions are significantly lower than previous values and start to restrict the range indicated by SM predictions.

    DOI: 10.1103/PhysRevLett.92.111801

  • Observation of radiative B -> phi K gamma decays Reviewed

    Drutskoy A, Abe K, Abe K, Abe T, Aihara H, Akatsu M, Asano Y, Aulchenko V, Aushev T, Bakich AM, Ban Y, Bay A, Bedny I, Behera PK, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Casey BCK, Chao Y, Cheon BG, Chistov R, Choi Y, Chuvikov A, Danilov M, Dash M, Dong LY, Eidelman S, Eiges V, Gabyshev N, Garmash A, Gershon T, Golob B, Haba J, Hagner C, Handa F, Hastings NC, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou WS, Huang HC, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawasaki T, Kichimi H, Kim DW, Kim HJ, Kim H, Kim JH, Kim SK, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kwon YJ, Lee SH, Lesiak T, Li J, MacNaughton J, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyata H, Mohapatra D, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Parslow N, Peters M, Piilonen LE, Root N, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Satpathy A, Schneider O, Schumann J, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Soni N, Stanic S, Staric M, Sugi A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Takasaki F, Tamura N, Tanaka M, Teramoto Y, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uno S, Varner G, Varvell KE, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yamada Y, Yamashita Y, Yamauchi M, Yuan Y, Yusa Y, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   92 ( 5 )   2004.02( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.92.051801

  • Observation of Radiative B → φKγ Decays Reviewed

    A. Drutskoy, et. al. [Belle Collaboation]

    Physical Review Letters   92   518011 - 518015   2004.02( ISSN:00319007

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    The radiative decay B → φKγ, which provide an important tool to search for physics beyond the standard model is observed. An upper limit for the particular decay mode and a branching fraction for the B -→φK-γ decay mode are obtained. It is found that the measured decay branching fraction is roughly an order of magnitude smaller than B→K*γ branching fractions. This factor can be attributed to the additional electron pair.

  • Measurements of the D-sJ resonance properties Reviewed

    Mikami Y, Abe K, Abe T, Aihara H, Akemoto M, Asano Y, Aso T, Aushev T, Bahinipati S, Bakich AM, Ban Y, Bay A, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Danilov M, Dong LY, Dragic J, Eidelman S, Eiges V, Fukunaga C, Furukawa K, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Handa F, Hara T, Hayashii H, Hazumi M, Higuchi I, Hinz L, Hokuue T, Hoshi Y, Hou WS, Huang HC, Iijima T, Ikeda H, Inami K, Ishikawa A, Iwasaki H, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kikutani E, Kim HJ, Kim JH, Kinoshita K, Koppenburg P, Krizan P, Krokovny P, Kulasiri R, Kuzmin A, Kwon YJ, Leder G, Lee SH, Lesiak T, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Masuzawa M, Matsumoto T, Matyja A, Mimashi T, Mitaroff W, Miyata H, Moloney GR, Nagamine T, Nagasaka Y, Nakamura TT, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ogawa Y, Ohmi K, Ohshima T, Ohuchi N, Oide K, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Parslow N, Piilonen LE, Sagawa H, Saitoh S, Sakai Y, Schneider O, Schwanda C, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Shidara T, Shwartz B, Sidorov V, Singh JB, Soni N, Stanic S, Staric M, Sugahara R, Sugi A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Takasaki F, Tanaka M, Tawada M, Teramoto Y, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uno S, Varner G, Watanabe Y, Yabsley BD, Yamada Y, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yanai H, Yang HY, Ying J, Yoshida M, Yusa Y, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   92 ( 1 )   2004.01( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.92.012002

  • Study of B- ---> D**0 pi- (D**0 ---> D(*)+ pi-) decays Reviewed

    K. Abe, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   69 ( 11 )   2004.01( ISSN:15507998

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    We report the results of a study of charged B decays to the [Formula Presented] and [Formula Presented] final states using complete [Formula Presented] reconstruction. The contributions of two-body [Formula Presented] decays with narrow [Formula Presented] and broad [Formula Presented] [Formula Presented] states have been determined and the masses and widths of four [Formula Presented] states have been measured. This is the first observation of the broad P-wave [Formula Presented] and [Formula Presented] mesons. The analysis is based on a data sample of 65 million [Formula Presented] pairs collected in the Belle experiment. © 2004 The American Physical Society.

    DOI: 10.1103/PhysRevD.69.112002

  • Measurement of the [Formula Presented] cross sections Reviewed

    T. Uglov, et. al. [Belle Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70 ( 7 )   2004.01( ISSN:15507998

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    We report first measurements of [Formula Presented] processes far above threshold. The cross sections for [Formula Presented] and [Formula Presented] at [Formula Presented] are measured to be [Formula Presented] and [Formula Presented], respectively. We set upper limits on the cross sections for [Formula Presented], [Formula Presented], [Formula Presented], and [Formula Presented] processes. The analysis is based on [Formula Presented] of data collected by the Belle experiment at the KEKB [Formula Presented] asymmetric collider. © 2004 The American Physical Society.

    DOI: 10.1103/PhysRevD.70.071101

  • Search for B--> J/psi Lambda(p)over-bar decay Reviewed

    Zang SL, Abe K, Abe K, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Danilov M, Dong LY, Eidelman S, Eiges V, Enari Y, Fukunaga C, Gabyshev N, Gershon T, Gokhroo G, Golob B, Guo R, Hagner C, Handa F, Hastings NC, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Huang HC, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim JH, Kim SK, Kinoshita K, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Palka H, Park H, Parslow N, Piilonen LE, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Satapathy M, Satpathy A, Schneider O, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Sidorov V, Singh JB, Soni N, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki SY, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Varner G, Wang CC, Wang CH, Wang JG, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Ying J, Yuan Y, Zhang CC, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW D   69 ( 1 )   2004.01( ISSN:0556-2821

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    DOI: 10.1103/PhysRevD.69.017101

  • Measurements of the D<inf>sj</inf> Resonance Properties Reviewed

    Y. Mikami, et. al. [Belle Collaboation]

    Physical Review Letters   92   120021 - 120026   2004.01( ISSN:00319007

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    The properties of the Dsj resonances were measured. The radiative decay mode and the dipion decay mode were observed and their branching fractions were also determined. Monte Carlo simulation was used that treats the Dsj(2317) as a scalar particle with mass 2317 MeV/c 2. The results show that no corresponding decays are observed for the Dsj(2317) state.

  • Study of B meson decays to three-body charmless hadronic final states Reviewed

    A. Garmash, et. al. [Belle Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   69 ( 1 )   2004.01( ISSN:15507998

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    We report results of a study of charmless B meson decays to three-body [Formula Presented] and [Formula Presented] final states. Measurements of branching fractions for B decays to [Formula Presented] and [Formula Presented] final states are presented. The decays [Formula Presented] and [Formula Presented] are observed for the first time. We also report evidence for [Formula Presented] decay. For the three-body final states [Formula Presented] and [Formula Presented] 90% confidence level upper limits are reported. Finally, we discuss the possibility of using the three-body [Formula Presented] decay for [Formula Presented] violation studies. The results are obtained with a 78 [Formula Presented] data sample collected at the [Formula Presented] resonance by the Belle detector operating at the KEKB asymmetric energy [Formula Presented] collider. © 2004 The American Physical Society.

    DOI: 10.1103/PhysRevD.69.012001

  • Measurement of [Formula Presented] with Dalitz plot analysis of [Formula Presented] decay Reviewed

    A. Poluektov, et. al. [Belle Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70 ( 7 )   2004.01( ISSN:15507998

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    We present a measurement of the unitarity triangle angle [Formula Presented] using a Dalitz plot analysis of the three-body decay of the neutral [Formula Presented] meson from the [Formula Presented] process. The method employs the interference between [Formula Presented] and [Formula Presented] to extract both the weak and strong phases. We apply this method to a [Formula Presented] data sample collected by the Belle experiment. The analysis uses the modes [Formula Presented] and [Formula Presented], [Formula Presented], where the neutral [Formula Presented] meson decays into [Formula Presented]. We obtain 146 signal candidates for [Formula Presented] and 39 candidates for [Formula Presented]. From a combined maximum likelihood fit to the [Formula Presented] and [Formula Presented] modes, we obtain [Formula Presented]. The corresponding 2 standard deviation interval is [Formula Presented]. © 2004 The American Physical Society.

    DOI: 10.1103/PhysRevD.70.072003

  • First measurement of the double-inclusive B/B̄ hadron energy distribution in e+e- annihilations, and of angle-dependent moments of the B and B̄ energies Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   578   45 - 53   2004.01( ISSN:03702693

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    We have made the first measurement of the double-inclusive B/B̄ energy distribution in e+e- annihilations, using a sample of 400 000 hadronic Z0-decay events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct B/B̄-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used to calculate the B energies in this novel technique. We measured the B/B̄ energies with good efficiency and resolution over the full kinematic range. We measured moments of the scaled energies of the B and B̄ hadrons vs. the opening angle between them. By comparing these results with perturbative QCD predictions we tested the ansatz of factorisation in heavy-quark production. A recent next-to-leading order calculation reproduces the data. © 2003 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2003.10.057

  • Development of event building farm for SuperKEKB Reviewed

    K Ito, H Aiahra, T Higuchi, R Itoh, M Iwasaki, H Kakuno, M Nakao, SY Suzuki

    IEEE 2004 IEEE Nuclear Science Symposium Conference Record, Vols 1-7   1319 - 1323   2004( ISSN:1082-3654

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    In order to search new physics beyond the Standard Model using B meson decays, we are planning SuperKEKB with a luminosity of 5 x 10(35) cm (-2)s(-1). To tolerate a high trigger rate of 10 similar to 30 kHz and to handle a large number of unified readout modules, we design a new event building farm. In order to validate the design, we have set up a prototype event building farm for SuperKEKB and measured the performance. The prototype of readout part works with at least 10 kHz event rate. For a design value, we fine that the further software improvement and the faster PC are needed. Event distribution part of the prototype tolerates the high event rate by increasing the number of event builder units. We conclude that the developed event building farm tolerates the high rate by adding event building units to keep up with gradual increase in lurninosity.

  • R&D of residual gas beam profile monitor Reviewed

    R Ishida, Y Nakahama, H Aihara, M Iwasaki, H Kakuno, H Noumi, Y Sato, A Toyoda

    IEEE 2004 IEEE Nuclear Science Symposium Conference Record, Vols 1-7   1798 - 1802   2004( ISSN:1082-3654

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    We have studied the Residual Gas Beam Profile Monitor (RGBPM) for the J-PARC neutrino beamline, here the Micro Channel Plate (MCP) is used as a read out device. We carried out the beam tests at the KEK-PS beamline to study the basic performance of the monitor. To check the capability of beam-profile measurement, we studied the properties of signal timing and the effect of electric field produced by the proton beam. We found that the ion collection is effective to avoid the beam induced background in a high beam background environment, and RGBPM works under the electric field produced by the beam itself of less than 20kV/m.
    In addition, the gain calibration method of MCP has been developed using thermal electrons from the glowing wire. We found the gain of MCP is calibrated with an accuracy of better than 5.

  • Evidence for B-0 ->pi(0)pi(0) Reviewed

    Lee SH, Suzuki K, Abe K, Abe K, Abe T, Adachi I, Ahn BS, Aihara H, Akai K, Akatsu M, Akemoto M, Asano Y, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banerjee S, Bay A, Bedny I, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Danilov M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Flanagan J, Fukunaga C, Furukawa K, Gabyshev N, Garmash A, Gershon T, Golob B, Guo R, Haba J, Hagner C, Handa F, Hastings NC, Hayashii H, Hazumi M, Higuchi I, Hokuue T, Hoshi Y, Hou WS, Huang HC, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Kakuno H, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawai H, Kawasaki T, Kichimi H, Kikutani E, Kim HJ, Kim H, Kim JH, Kim SK, Kinoshita K, Koiso H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, MacNaughton J, Mandl F, Marlow D, Masuzawa M, Matsumoto T, Matyja A, Michizono S, Mimashi T, Mitaroff W, Miyake H, Miyata H, Mohapatra D, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakamura TT, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ogawa Y, Ohmi K, Ohnishi Y, Ohshima T, Ohuchi N, Oide K, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Park CW, Park H, Park KS, Parslow N, Peak LS, Peters M, Piilonen LE, Root N, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Satapathy M, Satpathy A, Schneider O, Schumann J, Schwanda C, Schwartz AJ, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shidara T, Shwartz B, Sidorov V, Singh JB, Soni N, Stanic S, Staric M, Sugahara R, Sugi A, Sumisawa K, Sumiyoshi T, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka M, Tawada M, Taylor GN, Teramoto Y, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Unno Y, Uno S, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yang H, Yoshida M, Yusa Y, Zang SL, Zhang J, Zhang ZP, Zheng Y, Zhilich V, Zontar D, Zurcher D

    PHYSICAL REVIEW LETTERS   91 ( 26 )   2003.12( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.91.261801

  • Observation of the DsJ(2317) and DsJ(2457) in B decays Reviewed

    Krokovny P, Abe K, Abe K, Abe T, Adachi I, Aihara H, Akai K, Akatsu M, Akemoto M, Asano Y, Aso T, Aushev T, Bakich AM, Bedny I, Behera PK, Bizjak I, Bondar A, Bracko M, Browder TE, Casey BCK, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Dong LY, Dragic J, Eidelman S, Eiges V, Enari Y, Flanagan J, Gabyshev N, Garmash A, Gershon T, Golob B, Guo R, Hagner C, Handa F, Hastings NC, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou WS, Huang HC, Igarashi Y, Ikeda H, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Jang HK, Kamitani T, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kikutani E, Kim DW, Kim HJ, Kim H, Kim JH, Kinoshita K, Koiso H, Koppenburg P, Korpar S, Krizan P, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Lesiak T, Limosani A, Lin SW, MacNaughton J, Majumder G, Mandl F, Masuzawa M, Matsumoto T, Michizono S, Mikami Y, Mitaroff W, Miyata H, Mohapatra D, Moloney GR, Nagamine T, Nagasaka Y, Nakadaira T, Nakamura TT, Nakano E, Nakao M, Nakazawa H, Nam JW, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ogawa Y, Ohnishi Y, Ohshima T, Ohuchi N, Oide K, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Palka H, Park CW, Park H, Park KS, Parslow N, Piilonen LE, Root N, Rozanska M, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Satpathy A, Schneider O, Schwanda C, Schwartz AJ, Semenov S, Sevior ME, Shibuya H, Shidara T, Sidorov V, Singh JB, Soni N, Stanic S, Sugi A, Sumisawa K, Sumiyoshi T, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Tawada M, Teramoto Y, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Varvell KE, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamamoto N, Yamashita Y, Yamauchi M, Yanai H, Yuan Y, Zhang CC, Zhang ZP, Zhilich V, Zontar D

    PHYSICAL REVIEW LETTERS   91 ( 26 )   2003.12( ISSN:0031-9007

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.91.262002

  • Observation of the D<inf>sJ</inf>(2317) and D<inf>sJ</inf>(2457) in B Decays Reviewed

    P. Krokovny, et. al. [Belle Collaboation]

    Physical Review Letters   91   2620021 - 2620026   2003.12( ISSN:00319007

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    The DsJ(2317) and DsJ in B decays was observed. The observation of DsJ(2457)→Dsγ decay eliminated the zero spin of DsJ(2457). The angular analysis of this decay supported the hypothesis that the DsJ(2457) is a 1+ state. The possible feed across between all studied DsJ decay modes using Monte Carlo methods was analyzed. For each mode, branching fractions that are consistent with the world average values were measured.

  • Observation of B → K*ℓ+- Reviewed

    A. Ishikawa, et. al. [Belle Collaboation]

    Physical Review Letters   91   2616011 - 2616016   2003.12( ISSN:00319007

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    The observation of the flavor-changing neutral decay B → K*l+l- was reported. The branching fractions were calculated by assuming an equal production rate for charged and neutral B meson pairs. The measured branching fractions were found to be in agreement with the standard model predictions. The effect of systematic error was also included in the calculations.

  • Observation of a Narrow Charmoniumlike State in Exclusive B ± → K±π+π- J/Ψ Decays Reviewed

    S. K. Choi, S. L. Olsen, et. al. [Belle Collaboation]

    Physical Review Letters   91   2620011 - 2620016   2003.12( ISSN:00319007

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    A narrow charmoniumlike state in exclusive B±→K ±π+π-J/φ decays was observed. This mass value and the absence of a strong signal in the γχc1 decay channel were in some disagreement with potential model expectations for the 3Dc2 charmonium state. The mass was within errors at the D0D*0 mass threshold. The results show that charmonium decays to ρJ/φ violate isospin and are expected to be suppressed.

  • Measurement of Time-Dependent CP-Violating Asymmetries in B0 → φ K<inf>s</inf>0, K+K- K <inf>s</inf>0 and η′ K<inf>s</inf>0 Decays Reviewed

    K. Abe, et. al. [Belle Collaboation]

    Physical Review Letters   91   2616021 - 2616026   2003.12( ISSN:00319007

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    An improved measurement of the CP-violation parameters in decays based on a 140 fb-1 data sample was presented. One neutral B meson was reconstructed in one of the specified decay channels. Results show that there is a large CP-violating phase in its decay amplitude. It was also observed that the CP asymmetry in the decay differs from the standard model expectation by 3. 5 standard deviations.

  • Measurement of the B<inf>0</inf>-B̄0 mixing rate with B0(B̄0)→D*π ± partial reconstruction Reviewed

    Y. Zheng, T. E. Browder, et. al. [Belle Collaboration]

    Physical Review D   67 ( 9 )   2003.12( ISSN:05562821

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    We report a measurement of the B0-B̄0 mixing parameter Δmd based on a 29.1 fb-1 sample of Y(4S) resonance decays collected by the Belle detector at the KEKB asymmetric e +e- collider. We use events with a partially reconstructed B0(B̄0)→D*mnplus;π ± candidate and where the flavor of the accompanying B meson is identified by the charge of the lepton from a B0(B̄ 0)→X∓ℓ±v decay. The proper-time difference between the two B mesons is determined from the distance between the two decay vertices. From a simultaneous fit to the proper-time distributions for the same-flavor (B0(B̄0), ℓ±) and opposite-flavor (B0(B̄ 0),ℓ∓) event samples, we measure the mass difference between the two mass eigenstates of the neutral B meson to be Δmd = (0.509 ± 0.017 (stat) ± 0.020 (syst)) ps-1. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevD.67.092004

  • Search for time-dependent B<inf>s</inf>0-B<inf>s</inf>0 oscillations using a vertex charge dipole technique Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D   67   2003.12( ISSN:05562821

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    We report a search for Bs0-Bs0 oscillations using a sample of 400 000 hadronic Z0 decays collected by the SLD experiment. The analysis takes advantage of the electron beam polarization as well as information from the hemisphere opposite that of the reconstructed B decay to tag the B production flavor. The excellent resolution provided by the pixel CCD vertex detector is exploited to cleanly reconstruct both B and cascade D decay vertices, and tag the B decay flavor from the charge difference between them. We exclude the following values of the B s0-B̄s0 oscillation frequency: Δms<4.9 ps-1 and 7.9<Δm s<10.3 ps-1 at the 95% confidence level. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevD.67.012006

  • Search for B0→ℓ+- at the Belle detector Reviewed

    M. C. Chang, P. Chang, et. al. [Belle Collaboration]

    Physical Review D   68 ( 11 )   2003.12( ISSN:05562821

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    We report the results of a search for the decay B0→e +e-, μ+μ- and e ±μ∓ based on an analysis of 78 fb -1 of data collected by the Belle detector at KEKB. No candidate events have been found. Upper limits on the branching fractions are calculated at the 90% confidence level: B(B0→e+e -)<1.9×10-7, B(B0 →μ +μ-)<1.6×10-7, and B(B 0→e±μ∓)<1. 7×10-7. A limit on the Pati-Salam leptoquark mass M LQ46 TeV/c2 is obtained at the 90% confidence level. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevD.68.111101

  • Performances of RPCs in the BaBar experiment Reviewed

    F. Anulli, R. Baldini, H. Band, R. Bionta, J. Brau, V. Brigljevic, A. Buzzo, A. Calcaterra, M. Carpinelli, T. Cartaro, N. Cavallo, G. Crosetti, G. De Nardo, R. De Sangro, A. Eichenbaum, D. Falciai, F. Fabozzi, F. Ferroni, G. Finocchiaro, F. Forti, R. Frey, J. Johnson, C. Gatto, E. Grauges-Pous, M. Iwasaki, D. Lange, L. Lista, M. Lo Vetere, C. Lu, H. Neal, N. Neri, M. Macri, B. Messener, M. R. Monge, T. Moore, S. Morganti, A. Palano, E. Paoloni, P. Paolucci, S. Passaggio, F. Pastore, C. Patrignani, P. Patteri, I. Peruzzi, D. Piccolo, M. Piccolo, G. Piredda, A. Pompili, E. Robutti, A. Roodman, A. Santroni, C. Sciacca, N. Sinev, A. Soha, D. Storm, S. Tosi, J. Va'vra, Y. Xie, D. Wright, W. Wisniewski

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   515   322 - 327   2003.12( ISSN:01689002

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    The BaBar experiment uses a big system based on RPC detectors to discriminate muons from pions and to identify neutral hadrons. About 2000 m 2 of RPC chambers have been working at SLAC since the end of 1998. We report on the performances of the RPC chambers focusing on new problems discovered in the RPC behaviour. These problems started very soon after the installation of the chambers on the detector when the high-ambient temperature triggered an increase of dark currents inside the chambers and a reduction of the efficiency. Careful analysis of the BaBar data and dedicated R&D efforts in the laboratory have helped to identify the main source of the trouble in the linseed oil varnish on the bakelite electrodes. © 2003 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2003.09.018

  • Evidence for B0 → π0π0 Reviewed

    S. H. Lee, K. Suzuki, et. al. [Belle Collaboration]

    Physical Review Letters   91   2618011 - 2618015   2003.12( ISSN:00319007

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    The decay B0 → π0π0 was investigated. The analysis was based on the data sample collected with a Belle detector. It was assumed that neutral and charged B mesons are produced in equal amounts. A signal with a significance of 3.4 standard deviations was detected. The branching factor was also obtained by dividing the signal yield by reconstruction efficiency.

  • Observation of B ± → ρ ±ρ 0 decays Reviewed

    J. Zhang, M. Nakao, et. al. [Belle Collaboration]

    Physical Review Letters   91   2003.11( ISSN:00319007

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    An overview is given of the first observation of the vector-vector (VV) decay mode Β +→ρ +ρ 0. These decays produce final states where both ρ mesons are either longitudinally or transversely polarized.

  • Search for D0-D̄0 Mixing and a Measurement of the Doubly Cabibbo-Suppressed Decay Rate in D0 → Kπ Decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   91   1718011 - 1718017   2003.10( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.91.171801

  • Measurements of CP-Violating Asymmetries and Branching Fractions in B Meson Decays to η′K Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   91   1618011 - 1618017   2003.10( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.91.161801

  • Rare B Decays into States Containing a J/ψ Meson and a Meson with ss̄ Quark Content Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   91   718011 - 718017   2003.08( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.91.071801

  • Measurements of the branching fractions and bounds on the charge asymmetries of charmless three-body charged B decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   91   518011 - 518017   2003.08( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.91.051801

  • Mechanisms affecting performance of the BaBar resistive plate chambers and searches for remediation Reviewed

    F. Anulli, S. Bagnasco, R. Baldini, H. R. Band, R. Bionta, J. E. Brau, V. Brigljevic, A. Buzzo, A. Calcaterra, M. Carpinelli, T. Cartaro, N. Cavallo, G. Crosetti, R. De Sangro, G. De Nardo, A. Eichenbaum, F. Fabozzi, D. Falciai, F. Ferrarotto, F. Ferroni, G. Finocchiaro, F. Forti, R. Frey, C. Gatto, E. Grauges, M. Iwasaki, J. R. Johnson, D. J. Lange, Y. P. Lau, L. Lista, M. Lovetere, C. Lu, M. Macri, T. B. Moore, S. Morganti, N. Neri, H. Neal, A. Palano, E. Paoloni, P. Paolucci, S. Passaggio, F. Pastore, P. Patteri, I. Peruzzi, M. Piccolo, D. Piccolo, G. Piredda, E. Robutti, A. Roodman, A. Santroni, C. Sciacca, N. B. Sinev, D. Strom, A. Soha, S. Tosi, J. Va'vra, W. J. Wisniewski, D. M. Wright, Y. Xie, A. Zallo

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   508   128 - 132   2003.08( ISSN:01689002

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    The BaBar experiment at PEPII relies on the instrumentation of the flux return (IFR) for both muon identification and KL detection. The active detector is composed of resistive plate chambers (RPCs) operated in streamer mode. Since the start of operation the RPCs have suffered persistent efficiency deterioration and dark current increase problems. The "autopsy" of bad BaBar RPCs revealed that in many cases uncured linseed oil droplets had formed on the inner surface of the Bakelite plates, leading to current paths from oil "stalagmites" bridging the 2mm gap. In this paper, a possible model of this "stalagmite" formation and its effect on the dark current and efficiency of RPC chambers is presented. Laboratory test results strongly support this model. Based upon this model we are searching for solutions to eliminate the unfavorable effect of the oil stalagmites. The lab tests show that the stalagmite resistivity increases dramatically if exposed to the air, an observation that points to a possible way to remedy the damage and increase the efficiency. We have seen that flowing an oxygen gas mixture into the chamber helps to polymerize the uncured linseed oil. Consequently, the resistivity of the bridged oil stalagmites increases, as does that of the oil coating on the frame edges and spacers, significantly reducing the RPC dark currents and low-efficiency regions. We have tested this idea on two chambers removed from BaBar because of their low efficiency and high dark current. These test results are reported in the paper, and two other remediation methods also mentioned. We continue to study this problem, and try to find new treatments with permanent improvement. © 2003 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0168-9002(03)01292-0

  • Study of time-dependent CP asymmetry in neutral B decays to J/ψπ0 Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   91   2003.08( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.91.061802

  • Observation of the decay B± → π±π0, study of B± → K±π0, and search for B0 → π0 π0 Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   91   2003.07( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.91.021801

  • Evidence for B+ → J/ψpΛ̄ and search for B0 → J/ψpp̄ Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   90   2003.06( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.90.231801

  • Measurement of the B0 meson lifetime with partial reconstruction of B0→D*-π+ and B0→D*p+ decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   67   911011 - 911018   2003.05( ISSN:05562821

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    The neutral B meson lifetime is measured with the data collected by the BABAR detector at the PEP-II storage ring during the years 1999 and 2000, with a total integrated luminosity of 20.7 fb-1. The decays B0 →D*-π+ and B0→D*-p+ are selected with a partial-reconstruction technique, yielding samples of 6970 ±240 and 5520±250 signal events, respectively. With these events, the B0 lifetime is measured to be 1.533 ±0.034 (stat)±0.038 (syst) ps. This measurement serves as a test and validation of procedures required to measure the CP violation parameter sin(2β+γ) with partial reconstruction of these modes.

    DOI: 10.1103/PhysRevD.67.091101

  • Measurement of the Cabibbo-Kobayashi-Maskawa matrix element |V<inf>ub</inf>| with B → ρev decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   90   2003.05( ISSN:00319007

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    The branching fraction Β(Β0→rho;-e+v)=(3.29±0.42±0.47±0.55)x10-4was measured using isospin constraints and extrapolating to all electron energies according to five different form-factor calculations. The errors are statistical, systematic, and theoretical. The value of |Vub| determined by the same form-factor calculations is |Vub|=(3/64±0.22±0.25-0.56+0.39) X 10-3.

    DOI: 10.1103/PhysRevLett.90.181801

  • Measurement of the branching fraction, and bounds on the CP-violating asymmetries, of neutral B decays to D*±D Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   90   2218011 - 2218017   2003.05( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.90.221801

  • Improved direct measurement of the parity-violation parameter A<inf>b</inf> using a mass tag and momentum-weighted track charge Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   90   2003.04( ISSN:00319007

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    The highly polarized SLC electron beam and precise vertexing capabilities of the SLD detector were exploited to perform a direct measurement of Ab=0.906±0.022(stat)±0.023(syst), from the 1996-1998 SLD data sample. Combined with previously published result based on the 1993-1995 data sample, Ab=0.907 ± 0.020(stat) ±0.024(syst) was found for the full 1993-1998 data sample.

  • Measurement of the B0 → J/ψπ+π- branching fraction Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   90   2003.03( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.90.091801

  • Measurement of K K-+(-) production in two-photon collisions in the resonant-mass region Reviewed

    Abe K, Abe K, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Bay A, Bedny I, Bizjak I, Bozek A, Bracko M, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Dong LY, Eidelman S, Eiges V, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Hara T, Hayashii H, Hazumi M, Higuchi T, Hokuue T, Hoshi Y, Hou WS, Huang HC, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim JH, Kim SK, Korpar S, Krizan P, Krokovny P, Kuzmin A, Kwon YJ, Lee SH, Lesiak T, Li J, Limosani A, Lin SW, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Mitaroff W, Miyake H, Miyata H, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Parslow N, Piilonen LE, Sagawa H, Saitoh S, Sakai Y, Schneider O, Semenov S, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Soni N, Stanic S, Staric M, Sugi A, Sumisawa K, Sumiyoshi T, Suzuki SY, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tomura T, Tsuboyama T, Uehara S, Uno S, Varner G, Wang CC, Wang CH, Watanabe Y, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Ying J, Yuan Y, Yusa Y, Zhang CC, Zhang ZP, Zhilich V, Zontar D

    EUROPEAN PHYSICAL JOURNAL C   32 ( 3 )   323 - 336   2003.01( ISSN:1434-6044

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    DOI: 10.1140/epjc/s2003-01468-9

  • Observation of a narrow charmoniumlike state in exclusive [formula presented] decays Reviewed

    S. K. Choi, S. L. Olsen, et. al. [Belle Collaboation]

    Physical Review Letters   91 ( 26 )   2003.01( ISSN:00319007

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    We report the observation of a narrow charmoniumlike state produced in the exclusive decay process [Formula presented]. This state, which decays into [Formula presented], has a mass of [Formula presented], a value that is very near the [Formula presented] mass threshold. The results are based on an analysis of 152M [Formula presented]-[Formula presented] events collected at the [Formula presented] resonance in the Belle detector at the KEKB collider. The signal has a statistical significance that is in excess of [Formula presented]. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevLett.91.262001

  • Observation of [formula presented] decays Reviewed

    J. Zhang, M. Nakao, et. al. [Belle Collaboration]

    Physical Review Letters   91 ( 22 )   2003.01( ISSN:00319007

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    We report the first observation of the charmless vector-vector decay process [Formula presented]. The measurement uses a [Formula presented] data sample collected with the Belle detector at the KEKB asymmetric [Formula presented] collider operating at the [Formula presented] resonance. We obtain a branching fraction of [Formula presented]. An analysis of the [Formula presented] helicity-angle distributions gives a longitudinal polarization fraction of [Formula presented]. We also measure the direct-[Formula presented]-violating asymmetry [Formula presented]. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevLett.91.221801

  • Observation of [formula presented] Reviewed

    A. Ishikawa, et. al. [Belle Collaboation]

    Physical Review Letters   91 ( 26 )   2003.01( ISSN:00319007

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    We report the observation of the flavor-changing neutral current decay [Formula presented] and an improved measurement of the decay [Formula presented], where [Formula presented] represents an electron or a muon, with a data sample of [Formula presented] accumulated at the [Formula presented] resonance with the Belle detector at KEKB. The results for the branching fractions are [Formula Presented] and [Formula Presented], where the first error is statistical, the second is systematic and the third is from model dependence. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevLett.91.261601

  • Measurement of time-dependent [formula presented]-violating asymmetries in [formula presented], [formula presented], and [formula presented] decays Reviewed

    K. Abe, et. al. [Belle Collaboation]

    Physical Review Letters   91 ( 26 )   2003.01( ISSN:00319007

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    We present an improved measurement of [Formula presented]-violation parameters in [Formula presented], [Formula presented], and [Formula presented] decays based on a [Formula presented] data sample collected at the [Formula presented] resonance with the Belle detector at the KEKB energy-asymmetric [Formula presented] collider. One neutral [Formula presented] meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying [Formula presented] meson is identified from its decay products. [Formula presented]-violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two [Formula presented] decays. We find that the observed [Formula presented] asymmetry in the [Formula presented] decay differs from the standard model (SM) expectation by 3.5 standard deviations, while the other cases are consistent with the SM. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevLett.91.261602

  • Measurement of the branching fractions for the exclusive decays of B 0 and B+ to D̄(*)D(*)K Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D   68   2003.01( ISSN:05562821

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    We report the observation of 823±57 B0 and 970±65 B+ decays to doubly charmed final states D̄ (*)D(*)K, where D̄(*) and D(*) are fully reconstructed and K is either a K ± or a K0. We use a sample of 82.3 ±0.9 million B B̄ events collected between 1999 and 2002 with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center. The 22 ossible B decays to D̄(*)D(*)K are reconstructed exclusively and the corresponding branching fractions or limits are determined. The branching fractions of the B0 and of the B + to D̄(*)D(*)K are found to be Β(B0→D̄(*)D(*)K) = [4.3±0.3(stat)±0.6(syst)]%, Β(B+→D̄ (*)D(*)K) = [3.5±0.3(stat)±0. 5(syst)]%.A search for decays to orbitally excited Ds states, B→D̄(*)DsJ+(DsJ+→D(*)0K+), is also performed. No statistically significant-contributions from Ds1+(2536) →D*0K+ and DsJ+(2573) →D0K+ to the D̄(*)D (*)0K+ final state are found and we set 90% C.L. limits on their production rates. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevD.68.092001

  • Measurement of the branching fraction for inclusive semileptonic B meson decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   67   2003.01( ISSN:15507998

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    A largely model-independent measurement of the inclusive electron momentum spectrum and branching fraction for semileptonic decays of B mesons is presented based on data recorded at the [Formula Presented] resonance with the BABAR detector. Backgrounds from secondary charm decays are separated from prompt B decays using charge and angular correlations between the electron from one B meson and a high momentum electron tag from the second B meson. The resulting branching fraction is [Formula Presented] Based on this measurement we determine the Cabibbo-Kobayashi-Maskawa (CKM) matrix element [Formula Presented]. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevD.67.031101

  • Simultaneous measurement of the B0 meson lifetime and mixing frequency with B0→D*-+v <inf>ℓ</inf> decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D   67   2003.01( ISSN:05562821

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    We measure the B0 lifetime τB0 and the B 0-B̄0 oscillation frequency Δmd with a sample of approximately 14000 exclusively reconstructed B 0→D*-ℓ+vℓ signal events, selected from 23 million BB̄ pairs recorded at the Y(45) resonance with the BABAR detector at the Stanford Linear Accelerator Center. The decay position of the other B is determined with the remaining tracks in the event, and its b-quark flavor at the time of decay is determined with a tagging algorithm that exploits the correlation between the flavor of the b quark and the charges of its decay products. The lifetime and oscillation frequencies are measured simultaneously with an unbinned maximum-likelihood fit that uses, for each event, the measured difference in decay times of the two B mesons (Δt), the calculated uncertainty on Δt, the signal and background probabilities, and b-quark tagging information for the other B. The results are τB0=(1.523-0.023+0.024±0.022) ps and Δmd=(0.492±0.018 ±0.013) ps-1. The statistical correlation coefficient between τB0 and Δm d is -0.22. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevD.67.072002

  • Improved Direct Measurement of the Parity-Violation Parameter [Formula presented] Using a Mass Tag and Momentum-Weighted Track Charge Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   90   5   2003.01( ISSN:00319007

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    We present an improved direct measurement of the parity-violation parameter [Formula presented] in the [Formula presented] boson–[Formula presented]-quark coupling using a self-calibrating track-charge technique applied to a sample enriched in [Formula presented] events via the topological reconstruction of the [Formula presented] hadron mass. Manipulation of the Stanford Linear Collider electron-beam polarization permits the measurement of [Formula presented] to be made independently of other [Formula presented]-pole coupling parameters. From the 1996–1998 sample of 400000 hadronic [Formula presented] decays, produced with an average beam polarization of 73.4%, we find [Formula presented]. © 2003 The American Physical Society.

    DOI: 10.1103/PhysRevLett.90.141804

  • Improved study of the structure of e+e- → bb̄g events and limits on the anomalous chromomagnetic coupling of the b quark Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D   66   2002.12( ISSN:05562821

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    The structure of 3-jet e+ e- → bb̄g events has been studied using hadronic Z0 decays recorded in the SLC Large Detector experiment at SLAC. Three-jet final states were selected and the charge-coupled-device-based vertex detector was used to identify two of the jets as b or b̄; the remaining jet in each event was tagged as the gluon jet. Distributions of the gluon energy and polar angle with respect to the electron beam were measured over the full kinematic range, and used to test the predictions of perturbative QCD. We find that beyond-leading-order QCD calculations are needed to reproduce the features seen in the data. The energy distribution is sensitive to an anomalous b chromomagnetic moment K at the bb̄g vertex. We measured κ to be consistent with zero and set 95% confidence level limits on its value, -0.06<κ<0.04. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevD.66.052001

  • Measurements of branching fractions and CP-violating asymmetries in B0 → π+π-, K+π-, K+K- decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   89   2002.12( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.89.281802

  • Search for time-dependent B 0<inf>s</inf>- B̄ 0<inf>s</inf> oscillations using exclusively reconstructed D ±<inf>s</inf> mesons Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D   66   6   2002.12( ISSN:05562821

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    A search for B 0s-B̄ 0s oscillations is performed using a sample of 400 000 hadronic Z 0 decays collected by the SLAG Large Detector experiment. The B 0s candidates are reconstructed in the B 0s→D -sX channel with D -s→Φπ -, K* 0K -. The B 0s production flavor is determined using the large forward-backward asymmetry of polarized Z 0→bb̄ decays and charge information in the hemisphere opposite that of the B 0s candidate. The decay flavor is tagged by the charge of the D ±s. From a sample of 361 candidates with an average B 0s purity of 40%, we exclude the following values of the oscillation frequency: Δm s<1.4 ps -1 and 2.4<Δm s <5.3 ps -1 at the 95% confidence level. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevD.66.032009

  • The BaBar instrumented flux return performance: Lessons learned Reviewed

    F. Anulli, S. Bagnasco, R. Baldini, H. R. Band, R. Bionta, J. E. Brau, V. Brigljević, A. Buzzo, A. Calcaterra, M. Carpinelli, C. Cartaro, N. Cavallo, G. Crosetti, R. De Sangro, G. De Nardo, A. Eichenbaum, F. Fabozzi, D. Falciai, F. Ferrarotto, F. Ferroni, G. Finocchiaro, F. Forti, R. Frey, C. Gatto, E. Grauges, N. I. Iakovlev, M. Iwasaki, J. R. Johnson, D. J. Lange, L. Lista, M. Lo Vetere, C. Lu, M. Macri, R. Messner, T. B. Moore, S. Morganti, N. Neri, H. Neal, A. Palano, E. Paoloni, P. Paolucci, S. Passaggio, F. C. Pastore, P. Patteri, I. Peruzzi, M. Piccolo, D. Piccolo, G. Piredda, E. Robutti, A. Roodman, A. Santroni, C. Sciacca, N. B. Sinev, D. Strom, A. Soha, S. Tosi, J. Va'vra, W. J. Wisniewski, D. M. Wright, Y. Xie, A. Zallo

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   494   455 - 463   2002.11( ISSN:01689002

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    The BaBar Collaboration has operated an instrumented flux return (IFR) system covering over 2000 m2 with resistive plate chambers (RPCs) for nearly 3 years. The chambers are constructed of bakelite sheets separated by 2 mm. The inner surfaces are coated with linseed oil. This system provides muon and neutral hadron detection for BaBar. Installation and commissioning were completed in 1998, and operation began mid-year 1999. While initial performance of the system reached design, over time, a significant fraction of the RPCs demonstrated significant degradation, marked by increased currents and reduced efficiency. A coordinated effort of investigations have identified many of the elements responsible for the degradation. This article presents our current understanding of the aging process of the BaBar RPCs along with the action plan to combat performance degradation of the IFR system. © 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0168-9002(02)01532-2

  • Measurement of the CP asymmetry amplitude sin2β with B0 mesons Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   89   2018021 - 2018027   2002.11( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.89.201802

  • Measurement of the branching fraction and CP content for the decay B0 → D*+D*- Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   89   2002.08( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.89.061801

  • Measurement of the B0 lifetime with partially reconstructed B0 → D-+ν<inf>ℓ</inf> decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   89   118021 - 118027   2002.07( ISSN:00319007

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    The measurement of B0 lifetime with partially reconstructed B0→D-ℓ+νℓ decay was presented. The statistical error of the validation was included in the background systematic error. Results showed that the final relative error of ±1.9% was found by adding in quadrature the uncertainties from the sources.

  • Measurement of B0-B̄0 flavor oscillations in hadronic B0 decays Reviewed

    B. Aubert,

    Physical Review Letters   88   2002.06( ISSN:00319007

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    A new technique involving the time-difference distribution of a tagged sample of fully reconstructed neutral B decays was used to determine the B0-B̄0 mixing frequency Δmd. The obtained result is consistent with the current world average and a recent BABAR measurement with a dilepton sample.

  • Measurement of the B0-B̄0 oscillation frequency with inclusive dilepton events Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   2002.06( ISSN:00319007

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    An overview is given on the measurement of the time dependence of B0-B̄0 mixing using data collected with the BABAR detector at the PEP-II asymmetric energy e+e- collider operated at or near the Υ(4S) resonance. The result is the single most precise measurements to date and is consistent with a recent BABAR measurement with a fully reconstructed B0 sample, as well as the world average of previous measurements.

  • Search for the rare decays B → Kl+l- and B → K*l+l- Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   2418011 - 2418017   2002.06( ISSN:00319007

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    The results from a search for the flavor-changing neutral current decays were presented. The data sample was collected with the BABAR detector at PEP-II B factory. The signal efficiency of the decays were determined from phase-space Monte Carlo simulations. The Bele central value of 90% C.L. was obtained and was found close to standard model predictions for these branching fractions.

  • Search for T and CP violation in B0-B̄0 mixing with inclusive dilepton events Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   2318011 - 2318017   2002.06( ISSN:00319007

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    The results of a search for T and CP violation in B0-B̄0 mixing were presented. A same-sign dilepton asymmetry was obtained which was used to to extract the modulus of the ratio of complex mixing parameters. The background dilution correction was measured using data from full dilepton sample. The uncertainity on the ratio resulted in a ±3% multiplicative error.

  • Resistive plate chamber performance in the BaBar IFR system Reviewed

    F Anulli, S Bagnasco, R Baldini, HR Band, R Bionta, JE Brau, Brigljevic, V, A Buzzo, A Calcaterra, M Carpinelli, C Cartaro, N Cavallo, G Crosetti, R de Sangro, G De Nardo, A Eichenbaum, F Fabozzi, D Falciai, F Ferrarotto, F Ferroni, G Finocchiaro, F Forti, R Frey, C Gatto, E Grauges, M Iwasaki, Johnson, JR, DJ Lange, L Lista, M Lo Vetere, C Lu, M Macri, R Messner, TB Moore, S Morganti, H Neal, N Neri, A Palano, E Paoloni, P Paolucci, S Passaggio, F Pastore, P Patteri, Peruzzi, I, M Piccolo, D Piccolo, G Piredda, E Robutti, A Roodman, A Santroni, C Sciacca, NB Sinev, D Strom, A Soha, S Tosi, J Va'vra, WJ Wisniewski, DM Wright, Y Xie, A Zallo

    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC IEEE TRANSACTIONS ON NUCLEAR SCIENCE   49 ( 3 )   888 - 893   2002.06( ISSN:0018-9499

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    Publishing type:Research paper (scientific journal)  

    The BaBar Collaboration has operated a system covering over 2000 m(2) with resistive plate chambers for nearly three years. The chambers are constructed of bakelite sheets separated by 2 mm. The inner surfaces are coated with linseed oil. This system provides moon and neutral hadron detection for BaBar. Installation and commissioning were completed in 1998, and operation began mid-1999. While initial performance of the system reached design, over time, a significant fraction of the resistive plate chambers demonstrated significant degradation, marked by increased currents and reduced efficiency. A coordinated investigative effort has identified many of the elements responsible for the degradation.

  • Measurement of D<inf>s</inf>+ and D<inf>s</inf>*+ production in B meson decays and from continuum e+e- annihilation at √s = 10.6 GeV Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   65   911041 - 911048   2002.05( ISSN:05562821

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    New measurements of Ds+ and Ds*+ meson production rates from B decays and from qq̄ continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1 of data on the Y(4S) resonance and 2.6 fb-1 off-resonance, we find the inclusive branching fractions B(B→Ds+ X)=(10.93±0.19±0.58±2.73)% and B(B→Ds*+X)=(7.9±0.8±0.7 ±2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds+→φπ+ branching fraction uncertainty. The production cross sections σ(e+e- →Ds+X) × B(Ds+→φπ+)=7.55±0.20 ±0.34 pb and σ(e+e-→Ds *±X) × B(Ds+→φπ+) = 5.8±0.7±0.5 pb are measured at center-of-mass energies about 40 MeV below the Y(4S) mass. The branching fractions ΣB(B→Ds(*)+ D̄(*))=(5.07±0.14±0.30±1.27)% and ∑B(B→Ds*+D̄(*)) =(4.1±0.2±0.4±1.0)% are determined from the Ds(*)+ momentum spectra. The mass difference m(Ds+)-m(D+)=98.4±0.1 ±0.3 MeV/c2 is also measured.

    DOI: 10.1103/PhysRevD.65.091104

  • Study of B±→J/ψπ± and B±→J/ψK± decays: Measurement of the ratio of branching fractions and search for direct CP-violating charge asymmetries Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   65   911011 - 911017   2002.05( ISSN:05562821

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    We have studied the B±→J/ψπ± and B±→J/ψK± decays using a 20.7 fb-1 data set collected with the BABAR detector. We observe a signal of 51±10 B±→J/ψπ± events and determine the ratio B(B± →J/ψπ±)/B(B±→J/ψ K±) to be [3.91±0.78(stat)±0.19(syst)]%. The CP-violating charge asymmetries for the B±→J/ψπ± and B±→J/ψK± decays are determined to be Aπ=0.01±0.22(stat)±0.01(syst) and AK =0.003±0.030(stat)±0.004(syst).

    DOI: 10.1103/PhysRevD.65.091101

  • Measurement of the b-quark fragmentation function in Z0 decays Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   65   920061 - 9200612   2002.05( ISSN:05562821

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    We present a measurement of the b-quark inclusive fragmentation function in Z0 decays using a novel kinematic B-hadron energy reconstruction technique. The measurement was performed using 350 000 hadronic Z0 events recorded in the SLD experiment at SLAC between 1997 and 1998. The small and stable SLC beam spot and the charge-coupled-device-based vertex detector were used to reconstruct B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measured the B energy with good efficiency and resolution over the full kinematic range. We compared the scaled B-hadron energy distribution with models of b-quark fragmentation and with several ad hoc functional forms. A number of models and functions are excluded by the data. The average scaled energy of weakly decaying B hadrons was measured to be (xb) = 0.709±0.003(stat)±0.003(syst)±0.002(model).

  • Improved direct measurement of A<inf>b</inf> and A<inf>c</inf> at the Z0 pole using a lepton tag Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   88   1518011 - 1518015   2002.04( ISSN:00319007

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    The improved direct measurement of Ab at the Z0 pole using a lepton tag was presented. The measurements were carried out using identified charged leptons from semileptonic decays. The results obtained were found to be in agreement with the standard model predictions and were insensitive to uncertainties in standard model parameters and the top quark and Higgs boson masses.

  • Measurement of B → K*γ branching fractions and charge asymmetries Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   1018051 - 1018057   2002.03( ISSN:00319007

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    The branching fraction of the exclusive decays B0 → K*0γ and B+ → K*+γ measured from a sample of BB̄ decays collected with the BABAR detector at the PEP-II asymetric e+e- collider was discussed. It was found that the weighted average of the measured CP-violating charged asymmetries was Acp(B → K*γ) = -0.044 + 0.076 (stat) ± 0.012 (syst). The results showed the CP-violating charge asymmetry to be constrained to -0.170 < Acp(B → K*γ) < 0.082 at 90% C.L.

  • The BABAR detector Reviewed International coauthorship

    B. Aubert, et. al. [BaBar Collaboration]

    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   479   1 - 116   2002.02( ISSN:01689002

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    BABAR, the detector for the SLAC PEP-II asymmetric e+e- B Factory operating at the γ(4S) resonance, was designed to allow comprehensive studies of CP-violation in B-meson decays. Charged particle tracks are measured in a multi-layer silicon vertex tracker surrounded by a cylindrical wire drift chamber. Electromagnetic showers from electrons and photons are detected in an array of CsI crystals located just inside the solenoidal coil of a superconducting magnet. Muons and neutral hadrons are identified by arrays of resistive plate chambers inserted into gaps in the steel flux return of the magnet. Charged hadrons are identified by dE/dx measurements in the tracking detectors and by a ring-imaging Cherenkov detector surrounding the drift chamber. The trigger, data acquisition and data-monitoring systems, VME- and network-based, are controlled by custom-designed online software. Details of the layout and performance of the detector components and their associated electronics and software are presented. © 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0168-9002(01)02012-5

  • Measurement of branching fractions for exclusive B decays to charmonium final states Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   65   320011 - 3200123   2002.02( ISSN:05562821

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    We report branching fraction measurements for exclusive decays of charged and neutral B mesons into two-body final states containing a charmonium meson. We use a sample of 22.72±0.36 million BB̄ events collected between October 1999 and October 2000 with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. The charmonium mesons considered here are J/ψ, ψ(2S), and Xcl, and the light meson in the decay is either a K, K*, or π0.

  • Measurement of [Formula presented] Branching Fractions and Charge Asymmetries Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   7   2002.01( ISSN:00319007

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    The branching fractions of the exclusive decays [Formula presented] and [Formula presented] are measured from a sample of [Formula presented] [Formula presented] decays collected with the BABAR detector at the PEP-II asymmetric [Formula presented] collider. We find [Formula presented], [Formula presented] and constrain the [Formula presented]-violating charge asymmetry to be [Formula presented] at [Formula presented] C.L. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevLett.88.101805

  • Measurement of the branching fractions for Ψ(2S)→e +e- and Ψ(2S)→μ+- Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D   65   2002.01( ISSN:05562821

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    We measure the branching fractions of the Ψ(2S) meson to the leptonic final states e+e- and μ+μ- relative to that for Ψ(2S)→J/Ψπ_. The method uses Ψ(2S) mesons produced in the decay of B mesons at the Y(45) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the Ψ(2S) →J/Ψπ+π- branching fraction, we determine the e+e- and π+π- branching fractions to be 0.0078±0.0009±0.0008 and 0.0067±0. 0008±0.0007, respectively. © 2001 The American Physical Society.

    DOI: 10.1103/PhysRevD.65.031101

  • Measurement of the b-quark fragmentation function in [Formula Presented] decays Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   65   12   2002.01( ISSN:15507998

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    Publishing type:Research paper (scientific journal)  

    We present a measurement of the b-quark inclusive fragmentation function in (Formula presented) decays using a novel kinematic B-hadron energy reconstruction technique. The measurement was performed using 350 000 hadronic (Formula presented) events recorded in the SLD experiment at SLAC between 1997 and 1998. The small and stable SLC beam spot and the charge-coupled-device–based vertex detector were used to reconstruct B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measured the B energy with good efficiency and resolution over the full kinematic range. We compared the scaled B-hadron energy distribution with models of b-quark fragmentation and with several ad hoc functional forms. A number of models and functions are excluded by the data. The average scaled energy of weakly decaying B hadrons was measured to be (Formula presented). © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevD.65.092006

  • Measurement of the [Formula presented] Oscillation Frequency with Inclusive Dilepton Events Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   7   2002.01( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    The [Formula presented] oscillation frequency has been measured with a sample of [Formula presented] pairs collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we select events in which both [Formula presented] mesons decay semileptonically and use the charge of the leptons to identify the flavor of each [Formula presented] meson. A simultaneous fit to the decay time difference distributions for opposite- and same-sign dilepton events gives [Formula presented]. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevLett.88.221803

  • Measurement of the [Formula presented] Lifetime with Partially Reconstructed [Formula presented] Decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   89   2002.01( ISSN:00319007

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    The [Formula presented] lifetime was measured with a sample of 23 million [Formula presented] pairs collected by the BABAR detector at the PEP-II [Formula presented] storage ring during 1999 and 2000. Events from the semileptonic decay [Formula presented] have been selected with a partial reconstruction method in which only the charged lepton and the slow [Formula presented] from the [Formula presented] decay are reconstructed. The result is [Formula presented]. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevLett.89.011802

  • Search for the Rare Decays [Formula presented] and [Formula presented] Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   7   2002.01( ISSN:00319007

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    We present results from a search for the flavor-changing neutral current decays [Formula presented] and [Formula presented], where [Formula presented] is either an [Formula presented] or [Formula presented] pair. The data sample comprises [Formula presented] decays collected with the BABAR detector at the PEP-II B Factory. We obtain the [Formula presented] C.L. upper limits [Formula presented] and [Formula presented], close to standard model predictions for these branching fractions. We have also obtained limits on the lepton-family-violating decays [Formula presented] and [Formula presented]. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevLett.88.241801

  • Search for [Formula presented] and [Formula presented] Violation in [Formula presented] Mixing with Inclusive Dilepton Events Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   7   2002.01( ISSN:00319007

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    We report the results of a search for [Formula presented] and [Formula presented] violation in [Formula presented] mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II [Formula presented] Factory. The asymmetry between [Formula presented] and [Formula presented] events allows us to compare the probabilities for [Formula presented] and [Formula presented] oscillations and thus probe [Formula presented] and [Formula presented] invariance. Using a sample of [Formula presented] [Formula presented] pairs, we measure a same-sign dilepton asymmetry of [Formula presented]. For the modulus of the ratio of complex mixing parameters [Formula presented] and [Formula presented], we obtain [Formula presented]. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevLett.88.231801

  • Measurement of [Formula presented] Flavor Oscillations in Hadronic [Formula presented] Decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   88   7   2002.01( ISSN:00319007

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    Flavor oscillations of neutral B mesons have been studied in [Formula presented] annihilation data collected with the BABAR detector at center-of-mass energies near the [Formula presented] resonance. The data sample used for this purpose consists of events in which one [Formula presented] meson is reconstructed in a hadronic decay mode, while the flavor of the recoiling [Formula presented] is determined with a tagging algorithm that exploits the correlation between the flavor of the heavy quark and the charges of its decay products. From the time development of the observed mixed and unmixed final states, we determine the [Formula presented] oscillation frequency [Formula presented] to be [Formula presented]. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevLett.88.221802

  • Direct CP violation searches in charmless hadronic B meson decays Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review D   65   2002.01( ISSN:05562821

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    We search for direct CP violation in charmless hadronic B decays observed in a sample of about 22.7 million B B̄ pairs collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- collider. We measure the following charge asymmetries: ACp(B ±→η′K±=-0.11±0. 11±0.02, ACP(B±→ωπ ±) = -0.01 -0.31+0.29±0.03, ACPB±→φK±)= -0.05±0.20±0.03, ACP(B± → φK*±)= -0.430.30+0.36±0.06, and ACP(B0→φ K*0)=0.00±0.27±0.03. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevD.65.051101

  • Improved Direct Measurement of [Formula presented] and [Formula presented] at the [Formula presented] Pole Using a Lepton Tag Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   88   5   2002.01( ISSN:00319007

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    The parity violation parameters [Formula presented] and [Formula presented] of the [Formula presented] and [Formula presented] couplings have been measured directly, using the polar angle dependence of the polarized cross sections at the [Formula presented] pole. Bottom and charmed hadrons were tagged via their semileptonic decays. Both the electron and muon analyses take advantage of new multivariate techniques to increase the analyzing power. Based on the 1993–1998 SLD sample of 550 000 [Formula presented] decays produced with highly polarized electron beams, we measure [Formula presented], and [Formula presented]. © 2002 The American Physical Society.

    DOI: 10.1103/PhysRevLett.88.151801

  • Resistive plate chamber performance in the BaBar IFR system Reviewed

    F Anulli, S Bagnasco, R Baldini, HR Band, R Bionta, JE Brau, Brigljevic, V, A Buzzo, A Calcaterra, M Carpinelli, T Cartaro, N Cavallo, G Crosetti, R de Sangro, G De Nardo, A Eichenbaum, F Fabozzi, D Falciai, F Ferrarotto, F Ferroni, G Finocchiaro, F Forti, R Frey, C Gatto, E Grauges, M Iwasaki, Johnson, JR, DJ Lange, L Lista, M Lo Vetere, C Lu, M Macri, R Messner, TB Moore, S Morganti, N Neri, H Neal, A Palano, E Paoloni, P Paolucci, S Passaggio, F Pastore, P Patteri, Peruzzi, I, M Piccolo, D Piccolo, G Piredda, E Robutti, A Roodman, A Santroni, C Sciacca, NB Sinev, D Strom, A Soha, S Tosi, J Va'vra, WJ Wisniewski, DM Wright, Y Xie, A Zallo

    IEEE 2001 IEEE NUCLEAR SCIENCE SYMPOSIUM, CONFERENCE RECORDS, VOLS 1-4   519 - 524   2002( ISSN:1082-3654

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    The BaBar Collaboration has operated a system covering over 2000 m(2) with resistive plate chambers for nearly three years. The chambers are constructed of bakelite sheets separated by 2 mm. The inner surfaces are coated with linseed oil. This system provides muon and neutral hadron detection for BaBar. Installation and commissioning were completed in 1998, and operation began mid-year 1999. While initial performance of the system reached design, over time, a significant fraction of the RPCs demonstrated significant degradation, marked by increased currents and reduced efficiency. A coordinated effort of investigations have identified many of the elements responsible for the degradation.

  • Search for the decay B^0 → gamma-gamma Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.12( ISSN:00319007

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    We present a limit on the branching fraction for the decay B0→ ϒϒ using data collected at the ϒ(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e− collider. Based on the observation of one event in the signal region, out of a sample of 21.3 · 106 e+e− → ϒ(4S) → BB― decays, we establish an upper limit on the branching fraction of B(B0→ ϒϒ) < 1.7 · 10−6 at the 90% confidence level. This result substantially improves upon existing limits. © 2001 The American Physical Society.

    DOI: 10.1103/PhysRevLett.87.241803

  • Measurement of the B → J/ΨK* (892) decay amplitudes Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.12( ISSN:00319007

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    We present a measurement of the decay amplitudes in B → J/ΨK* channels using 20.7 fb−1 of data collected at the ϒ(4S) resonance with the BABAR detector at PEP-II. We measure a P-wave fraction R⊥=(16.0°3.2°1.4)% and a longitudinal polarization fraction (59.7°2.8°2.4)%. The measurement of a relative phase that is neither 0 nor π, ψ‖ = 2.50°0.20°0.08 radians, favors a departure from the factorization hypothesis. Although the decay B → J/ΨKπ proceeds mainly via K*(892), there is also evidence for K*2(1430) and KπS-wave contributions. © 2001 The American Physical Society.

    DOI: 10.1103/PhysRevLett.87.241801

  • Search for the decay B0 → γγ Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2418031 - 2418037   2001.12( ISSN:00319007

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    A limit on the branching fraction for the decay Bo→γγ was presented using data collected at the γ(4S) resonance at the PEP-II asymmetric energy collider. The energy resolution was measured with a radioactive source at low energy and with electrons from Bhabha scattering at high energy. The energy deposits were reconstructed by grouping adjacent crystals with energy deposits greater than 1 MeV into clusters.

  • Measurements of the branching fractions of exclusive charmless B meson decays with η′ or ω mesons Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.11( ISSN:00319007

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    An overview is given on the results of searches for B decays to the charmless two-body final states B+→wπ+, B+→wK+, B+→η'π+, B+→η'K+, B0→wK0, B0→wπ0, and B0→η,'K0. The results are based on data taken in the 1999-2000 run. The data were collected with the BABAR detector at the PEP-II asymmetric e+e- collider located at the Stanford Linear Accelerator Center.

  • Measurement of the B0 and B+ meson lifetimes with fully reconstructed hadronic final states Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.11( ISSN:00319007

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    An overview is given on lifetime measurements based on a sample of approximately 23 million BB̄ pairs recorded near the Y(4S) resonance with the BABAR detector. The determined B0 and B+ meson lifetimes and their ratio are highlighted.

  • The LCDROOT Analysis Package Reviewed

    Toshinori Abe, Masako Iwasaki

    eConf C010630 (2001) E3045   2001.10

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    The North American Linear Collider Detector group has developed simulation
    and analysis program packages. LCDROOT is one of the packages, and is based on
    ROOT and the C++ programing language to maximally benefit from object oriented
    programming techniques. LCDROOT is constantly improved and now has a new
    topological vertex finder, ZVTOP3. In this proceeding, the features of the
    LCDROOT simulation are briefly described.

  • Measurement of branching fractions and search for CP-violating charge asymmetries in charmless two-body B decays into pions and kaons Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.10( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.87.151802

  • Measurement of the decays B → φK and B → φK Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.10( ISSN:00319007

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    DOI: 10.1103/PhysRevLett.87.151801

  • Measurement of J/ψ production in continuum e+e- annihilations near √s = 10.6 GeV Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.10( ISSN:00319007

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    The cross section σe+e- → J/ψX = 2.52 ± 0.21 ± 0.21 pb was measured. Restricting to p* > 2 GeV/c, 1.87 ± 0.10 ± 0.15 pb were found. The total cross section and the angular distribution favor the NRQCD calculation over the color singlet model.

  • Observation of CP violation in the B0 meson system Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   2001.08( ISSN:00319007

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    We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of γ(4S)decays collected in 2001, bringing the data available to 32 ×106 BB¯ We select events in which one neutral B meson is fully reconstructed in a final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2β, is derived from the decay time distributions in such events. The result sin2β=0.59 ± 0.14(stat)±0.05(syst) establishes CP violation in the B0 meson system. We also determine |λ|= 0.93±0.09(stat)±0.03(syst), consistent with no direct CP violation. © 2001 The American Physical Society.

    DOI: 10.1103/PhysRevLett.87.091801

  • Improved measurement of the probability for gluon splitting into bb̄ in Z0 decays Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   507   61 - 69   2001.05( ISSN:03702693

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    We have measured gluon splitting into bottom quarks, g → bb̄, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b̄ jets. The upgraded CCD-based vertex detector gives very high B-tagging efficiency, especially for B hadrons with the low energies typical of this process. We measured the rate of g → bb̄ production per hadronic event, gbb̄, to be (2.44 ± 0.59(stat.) ± 0.34(syst.)) × 10-3. © 2001 Elsevier Science B.V.

    DOI: 10.1016/S0370-2693(01)00367-7

  • Measurement of A<inf>c</inf> with charmed mesons at the SLAC large detector Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   63   320051 - 3200514   2001.04( ISSN:05562821

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    We present a direct measurement of the parity-violation parameter Ac in the coupling of the Z0 to c quarks with the SLD detector. The measurement is based on a sample of 530 k hadronic Z0 decays, produced with a mean electron-beam polarization of |Pe| = 73%. The tagging of c-quark events is performed using two methods: the exclusive reconstruction of D*+, D+, and D0 mesons, and the soft pions (πs) produced in the decay of D*+→D0πs+. The large background from D mesons produced in B hadron decays is separated efficiently from the signal using precision vertex information. The combination of these two methods yields Ac= 0.688 ± 0.041.

  • Measurement of CP-violating asymmetries in B0 decays to CP Eigenstates Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   86   2515 - 2522   2001.03( ISSN:00319007

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    Using a data sample of 23 × 106 BB̄ pairs recorded at the Y(4S) resonance, a sample BCP of neutral B mesons decaying to the CP eigenstates was reconstructed. Each of the events in this sample was examined for evidence that the other neutral B meson decayed as B0 or a B̄0. The obtained value is consistent with the range implied by measurements and theoretical estimates of the magnitudes of CKM matrix elements.

    DOI: 10.1103/PhysRevLett.86.2515

  • First symmetry tests in polarized Z0 decays to bb̄g Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   86   962 - 966   2001.02( ISSN:00319007

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    Symmetry tests in polarized Z0 decays to bb̄g were made. From the forward-backward polar-angle asymmetry of the signed-thrust axis and the azimuthal-angle asymmetry, the parity-violation parameters AP and A′P were found to be consistent with O(αs2) quantum chromodynamic (QCD) expectations. A corresponding 95% C.L. limit was set on parity violation at the bb̄g vertex. Using the event-plane normal polar-angle distributions, 95% C.L. limits were set on the T-odd and CP-even and CP-odd asymmetry parameters AT+ and AT-.

    DOI: 10.1103/PhysRevLett.86.962

  • Improved direct measurement of leptonic coupling asymmetries with polarized Z bosons Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   86   1162 - 1166   2001.02( ISSN:00319007

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    Direct measurements of the asymmetry parameters Ae, Aμ, and AT using leptonic Z decays were carried out based on the 3.8 X 105Zs collected during 1996-1998 by the SLAC Large Detector (SLD) experiment at the SLC. The results were combined with earlier leptonic asymmetry measurements and the more precise left-right asymmetry measurements using Z decays to hadrons.

    DOI: 10.1103/PhysRevLett.86.1162

  • Measurement of J/ψ production in continuum e+e- annihilations near √s = 10.6 GeV Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   538 - 541   2001.01( ISSN:00319007

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    The production of J/ψ mesons in continuum e+e- annihilations has been studied with the BABAR detector at energies near the Υ(4S) resonance. The mesons are distinguished from J/ψ production in B decays through their center-of-mass momentum and energy. We measure the cross section e+e- → J/ψX to be 2.52 ± 0.21 ± 0.21pb. We set a 90% C.L. upper limit on the branching fraction for direct Υ(4S) → J/ψX decays at 4.7 × 10-4. © 2001 The American Physical Society.

    DOI: 10.1103/PhysRevLett.87.162002

  • Measurements of the branching fractions of exclusive charmless B meson decays with η′ or ω mesons Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   221802   2001.01( ISSN:00319007

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    We present the results of searches for B decays to charmless two-body final states containing η′ or ω mesons, based on 50.7fb-1 of data collected with the BABAR detector. We find the branching fractions B(B+ → η′K+) = (70 ± 8 ± 5) × 10-6, B(B0 → η′K0) = (42+13-11 ± 4) × 10-6, and B(B+ → ωπ+) = (6.6+2.1-1.8 ± 0.7) × 10-6, where the first error quoted is statistical and the second is systematic. We give measurements of four additional modes for which the 90% confidence level upper limits are B(B+ → η′π+) < 12 × 10-6, B(B+ → ωK+) < 4 × 10-6, B(B0 → ωK0) < 13 × 10-6, and B(B0 → ωπ0) < 3 × 10-6. © 2001 The American Physical Society.

    DOI: 10.1103/PhysRevLett.87.221802

  • Measurement of the B0 and B+ meson lifetimes with fully reconstructed hadronic final states Reviewed

    B. Aubert, et. al. [BaBar Collaboation]

    Physical Review Letters   87   201803   2001.01( ISSN:00319007

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    The B0 and B+ meson lifetimes have been measured in e+e- annihilation data collected in 1999 and 2000 with the BABAR detector at center-of-mass energies near the γ(4S) resonance. Events are selected in which one B meson is fully reconstructed in a hadronic final state while the second B meson is reconstructed inclusively. A combined fit to the B0 and the B+ decay time difference distributions yields τB0 = 1.546 ± 0.032(stat) ± 0.022(syst) ps, τB+ = 1.673 ± 0.032(stat) ± 0.023(syst) ps, and τB+/τB0 = 1.082 ± 0.026(stat) ± 0.012(syst). © 2001 The American Physical Society.

    DOI: 10.1103/PhysRevLett.87.201803

  • Measurement of Ac with charmed mesons at the SLAC LargeDetector Reviewed

    SLD Collab. K. Abe et al.

    Phys. Rev. D   ( D63 )   032005   2001

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    DOI: 10.1103/PhysRevD.63.032005

  • Higgs branching ratio measurements at a future linear collider Reviewed

    JE Brau, C Potter, M Iwasaki

    AMER INST PHYSICS PHYSICS AND EXPERIMENTS WITH FUTURE LINEAR E(PLUS) E(MINUS) COLLIDERS   578   267 - 270   2001( ISSN:0094-243X

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    The next Linear Collider should provide the capability to measure with precision the Higgs branching ratios, constraining the models of electroweak symmetry breaking. The precision of a proposed CCD vertex detector is studied for 120 GeV/c(2) and 140 GeV/c(2) Higgs production at roots = 500 GeV.

  • LCD ROOT simulation and analysis tools Reviewed

    M Iwasaki, T Abe

    AMER INST PHYSICS PHYSICS AND EXPERIMENTS WITH FUTURE LINEAR E(PLUS) E(MINUS) COLLIDERS   578   672 - 675   2001( ISSN:0094-243X

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    The North American Linear Collider Detector group has developed a simulation program package based on the ROOT system. The package consists of Fast simulation, the reconstruction of the Full simulated data, and physics analysis utilities.

    DOI: 10.1063/1.1394404

  • Linear Collider vertex detector optimization for Higgs branching ratio measurements Reviewed

    JE Brau, C Potter, M Iwasaki

    AMER INST PHYSICS PHYSICS AND EXPERIMENTS WITH FUTURE LINEAR E(PLUS) E(MINUS) COLLIDERS   578   795 - 798   2001( ISSN:0094-243X

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    The Higgs branching ratio measurement is a premier goal of the next Linear Collider physics program. Variations of a CCD vertex detector have been studied to assess the impact of inner radius and hit precision on the measurement of the Higgs branching ratios. A small dependence is found when the beampipe radius is varied between 1.2 cm and 2.4 cm, and the hit precision between 3 mum and 5 mum.

  • Study of top-quark production and decay vertices with LCD fast simulation Reviewed

    M Iwasaki

    AMER INST PHYSICS PHYSICS AND EXPERIMENTS WITH FUTURE LINEAR E(PLUS) E(MINUS) COLLIDERS   578   348 - 351   2001( ISSN:0094-243X

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    We report a study of top-quark reconstruction in e(+)e(-) --&gt; t (t) over bar events at a 500 GeV linear collider using the LCD Fast simulator. The initial study of top-quark anomalous couplings is also reported. The final states of 4 jets and lepton as well as 6 jets are used. Using the 4 jets and lepton final state, we estimate the preliminary sensitivities for form factors at the gamma/Z(0)t (t) over bar vertex, In the 6 jets reconstruction, we show abilities of the top-quark charge identification and the c-quark tagging in W decays.

    DOI: 10.1063/1.1394339

  • Measurements of parity-violation parameters at SLD Reviewed

    M Iwasaki

    WORLD SCIENTIFIC PUBL CO PTE LTD HIGH ENERGY PHYSICS, VOLS I AND II   641 - 643   2001

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    We present direct measurements of the parity-violation parameters A(b), A(c), and A(s) at the Z(0) resonance with the SLD detector. The measurements are based on approximately 530k hadronic Z(0) events collected in 1993-98. Obtained results are A(b) = 0.914 +/- 0.024 (SLD combined: preliminary), A(c) = 0.635 +/- 0.027 (SLD combined: preliminary), and A(s) = 0.895 +/- 0.066(stat.) +/- 0.062(sys.).

  • Search for charmless hadronic decays of B mesons with the SLAC SLD detector Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   62   1 - 6   2000.10( ISSN:05562821

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    Based on a sample of approximately 500 000 hadronic Z0 decays accumulated between 1993 and 1998, the SLD experiment has set limits on 24 fully charged two-body and quasi-two-body exclusive charmless hadronic decays of B+, B0, and Bs0 mesons. The precise tracking capabilities of the SLD detector provided for the efficient reduction of combinatoric backgrounds, yielding the most precise available limits for ten of these modes.

  • Precise measurement of the b-quark fragmentation function in Z0 boson decays Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   84   4300 - 4304   2000.05( ISSN:00319007

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    We have developed a new technique for inclusive reconstruction of the energy of B hadrons. The excellent efficiency and resolution of this technique allow us to make the most precise determination of the b-quark fragmentation function, using e+e-→Z0 decays recorded in the SLAC Large Detector experiment. We compared our measurement with the predictions of a number of fragmentation models. We excluded several of these models and measured the average scaled energy of weakly decaying B hadrons to be (xB) = 0.714 ± 0.005(stat) ± 0.007(syst) ± 0.002 (model dependence). © 2000 The American Physical Society.

    DOI: 10.1103/PhysRevLett.84.4300

  • Search for charmless hadronic decays of B mesons with the SLAC SLD detector Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   62   6   2000.01( ISSN:15507998

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    Publishing type:Research paper (scientific journal)  

    Based on a sample of approximately 500 000 hadronic (Formula presented) decays accumulated between 1993 and 1998, the SLD experiment has set limits on 24 fully charged two-body and quasi-two-body exclusive charmless hadronic decays of (Formula presented) (Formula presented) and (Formula presented) mesons. The precise tracking capabilities of the SLD detector provided for the efficient reduction of combinatoric backgrounds, yielding the most precise available limits for ten of these modes. © 2000 The American Physical Society.

    DOI: 10.1103/PhysRevD.62.071101

  • Measurement of the cross-section and forward-backward charge asymmetry for the b and c-quark in e+e- annihilation with inclusive muons at √s = 58 GeV Reviewed

    Y. Inoue, A. Miyamoto, E. Nakano, T. Takahashi, T. Tauchi, Y. Teramoto, et. al. [TOPAZ Collaboration]

    European Physical Journal C   18 ( 2 )   273 - 282   2000.01( ISSN:14346044

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    We have studied inclusive muon events using all the data collected by the TOPAZ detector at √s = 58GeV with an integrated luminosity of 273pb-1. From 1328 inclusive muon events, we measured the ratio Rqq̄ of the cross section for qq̄ production to the total hadronic cross section and forward-backward asymmetry AqFB for b and c quarks. The obtained results are Rbb̄ = 0.13±0.02(stat)±0.01(syst), Rcc̄ = 0.36±0.05(stat)±0.05(syst), AbFB = -0.20±0.16(stat)±0.01(syst) and AcFB = -0.17±0.14(stat)± 0.02(syst), in fair agreement with a prediction of the standard model.

    DOI: 10.1007/s100520000541

  • First direct measurement of the parity-violating coupling of the Z<inf>0</inf> to the s quark Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   85   5059 - 5063   2000.01( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    We present the first direct measurement of As, the parity-violating coupling of the Z0 boson to the strange quark, using ∼550 000 e+e−→Z0→hadrons events recorded by the SLC Large Detector with a polarized e− beam. We tagged Z0→ss¯ events by the absence of B or D hadrons and the presence in each hemisphere of a high momentum K± or Ks0. Fitting the polar angle distributions of the strangeness-signed thrust axis gave As=0.895±0.066(stat)±0.062(syst). The analyzing power and uu¯+dd¯ background were constrained using the data, greatly reducing any model dependence. © 2000 The American Physical Society.

    DOI: 10.1103/PhysRevLett.85.5059

  • High-precision measurement of the left-right Z Boson cross-section asymmetry Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   84   5945 - 5949   2000.01( ISSN:00319007

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    We present a measurement of the left-right cross-section asymmetry (ALR) for Z boson production by e+e− collisions. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider during the period 1996–1998. Using a sample of 383487 decays collected during the 1996–1998 runs we measure the pole value of the asymmetry, ALR0, to be 0.15056 ± 0.00239 which is equivalent to an effective weak mixing angle of sin2 θeffW = 0.23107 ± 0.00030. Our result for the complete 1992–1998 data set comprising approximately 537 000 Z decays is sin2 θeffW = 0.23097 ± 0.00027. © 2000 American Physical Society.

    DOI: 10.1103/PhysRevLett.84.5945

    PubMed

  • Study of the structure of e(+)e(-)-&gt; b(b)over-bar-g events and first limits on the anomalous chromomagnetic coupling of the b quark Reviewed

    K Abe, K Abe, T Abe, Adam, I, H Akimoto, T Akagi, NJ Allen, WW Ash, D Aston, KG Baird, C Baltay, HR Band, MB Barakat, O Bardon, TL Barklow, GL Bashindzhagyan, JM Bauer, G Bellodi, R Ben-David, AC Benvenuti, GM Bilei, D Bisello, G Blaylock, Bogart, JR, GR Bower, JE Brau, M Breidenbach, WM Bugg, D Burke, TH Burnett, PN Burrows, A Calcattera, D Calloway, B Camanzi, M Carpinelli, R Cassell, R Castaldi, A Castro, M Cavalli-Sforza, A Chou, E Church, HO Cohn, JA Coller, MR Convery, Cook, V, R Cotton, RF Cowan, DG Coyne, G Crawford, CJS Damerell, MN Danielson, M Daoudi, N de Groot, R Dell'Orso, PJ Dervan, R de Sangro, M Dima, A D'Oliveira, DN Dong, M Doser, R Dubois, BI Eisenstein, Eschenburg, V, E Etzion, S Fahey, D Falciai, C Fan, JP Fernandez, MJ Fero, K Flood, R Frey, J Gifford, T Gillman, G Gladding, S Gonzalez, ER Goodman, EL Hart, JL Harton, A Hasan, K Hasuko, SJ Hedges, SS Hertzbach, MD Hildreth, J Huber, ME Huffer, EW Hughes, Huynh, X, H Hwang, M Iwasaki, DJ Jackson, P Jacques, JA Jaros, ZY Jiang, AS Johnson, Johnson, JR, RA Johnson, T Junk, R Kajikawa, M Kalelkar, Y Kamyshkov, HJ Kang, Karliner, I, H Kawahara, YD Kim, ME King, R King, RR Kofler, NM Krishna, RS Kroeger, M Langston, A Lath, DWG Leith, Lia, V, C Lin, MX Liu, Liu, X, M Loreti, A Lu, HL Lynch, J Ma, G Mancinelli, S Manly, G Mantovani, TW Markiewicz, T Maruyama, H Masuda, E Mazzucato, AK McKemey, BT Meadows, G Menegatti, R Messner, PM Mockett, KC Moffeit, TB Moore, M Morii, D Muller, Murzin, V, T Nagamine, S Narita, U Nauenberg, H Neal, M Nussbaum, N Oishi, D Onoprienko, LS Osborne, RS Panvini, CH Park, TJ Pavel, Peruzzi, I, M Piccolo, L Piemontese, KT Pitts, RJ Plano, R Prepost, CY Prescott, GD Punkar, J Quigley, BN Ratcliff, TW Reeves, J Reidy, PL Reinertsen, PE Rensing, LS Rochester, PC Rowson, JJ Russell, OH Saxton, T Schalk, RH Schindler, BA Schumm, J Schwiening, S Sen, VV Serbo, MH Shaevitz, JT Shank, G Shapiro, DJ Sherden, KD Shmakov, C Simopoulos, NB Sinev, Smith, SR, MB Smy, JA Snyder, H Staengle, A Stahl, P Stamer, H Steiner, R Steiner, MG Strauss, D Su, F Suekane, A Sugiyama, S Suzuki, M Swartz, A Szumilo, T Takahashi, FE Taylor, J Thom, E Torrence, NK Toumbas, T Usher, C Vannini, J Va'vra, E Vella, JP Venuti, R Verdier, PG Verdini, DL Wagner, Wagner, SR, AP Waite, S Walston, J Wang, SJ Watts, AW Weidemann, ER Weiss, JS Whitaker, SL White, FJ Wickens, B Williams, DC Williams, SH Williams, S Willocq, RJ Wilson, WJ Wisniewski, JL Wittlin, M Woods, GB Word, TR Wright, J Wyss, RK Yamamoto, JM Yamartino, Yang, X, J Yashima, SJ Yellin, CC Young, H Yuta, C Zapalac, RW Zdarko, J Zhou

    AMER PHYSICAL SOC PHYSICAL REVIEW D   60 ( 9 )   1999.11( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)  

    The structure of e(+) e(-) --&gt; &lt;b(b)over bar&gt;g events was studied using Z(0) decays recorded in the SLC Large Detector experiment at SLAC. Three-jet final states were selected and the charge-coupled device-based vertex detector was used to identify two of the jets as b or (b) over bar. Distributions of the gluon energy and polar angle were measured over the full kinematic range for the first time, and compared with perturbative QCD predictions. The energy distribution is potentially sensitive to an anomalous b chromomagnetic moment kappa. We measured kappa to be consistent with zero and set the first limits on its value: -0.17&lt;kappa&lt;0.11 at 95% C.L. [S0556-2821(99)01121-2].

  • Study of the structure of e+e-→bb̄g events and first limits on the anomalous chromomagnetic coupling of the b quark Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   60   1 - 5   1999.11( ISSN:05562821

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    Publishing type:Research paper (scientific journal)  

    The structure of e+e-→bb̄g events was studied using Z0 decays recorded in the SLC Large Detector experiment at SLAC. Three-jet final states were selected and the charge-coupled device-based vertex detector was used to identify two of the jets as b or b. Distributions of the gluon energy and polar angle were measured over the full kinematic range for the first time, and compared with perturbative QCD predictions. The energy distribution is potentially sensitive to an anomalous b chromomagnetic moment κ. We measured κ to be consistent with zero and set the first limits on its value: -0.17<κ<0.11 at 95% C.L. ©1999 The American Physical Society.

  • Measurement of the jet width in gamma gamma collisions and in e(+)e(-) annihilation process at TRISTAN Reviewed

    Adachi K, Hayashii H, Miyabayashi K, Noguchi S, Miyamoto A, Tauchi T, Abe K, Abe T, Adachi I, Aoki M, Aoki M, Enomoto R, Emi K, Fujii H, Fujii K, Fujii T, Fujimoto J, Fujiwara N, Hirano H, Howell B, Iida N, Ikeda H, Inoue Y, Itami S, Itoh R, Iwasaki H, Iwasaki M, Kajikawa R, Kaneyuki K, Kato S, Kawabata S, Kichimi H, Kobayashi M, Koltick D, Levine I, Mamada H, Muramatsu K, Nagai K, Nakabayashi K, Nakamura M, Nakano E, Nitoh O, Ochi A, Ochiai F, Ohishi N, Ohnishi Y, Ohshima Y, Okuno H, Okusawa T, Shibata E, Sugiyama A, Sugiyama H, Suzuki S, Takahashi K, Takahashi T, Tanimori T, Teramoto Y, Tomoto M, Tsukamoto T, Tsumura T, Uno S, Watanabe Y, Yamamoto A, Yamauchi M

    PHYSICS LETTERS B   451 ( 1-2 )   256 - 266   1999.04( ISSN:0370-2693

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  • Production of π+, K+, K0, K*0, φ, p and Λ0 in hadronic Z0 decays Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   59   1 - 33   1999.03( ISSN:05562821

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    Publishing type:Research paper (scientific journal)  

    We have measured the differential production cross sections as a function of scaled momentum xp=2p/Ec.m. of the identified hadron species π+, K+, K0, K*0, φ, p, Λ0, and of the corresponding antihadron species in inclusive hadronic Z0 decays, as well as separately for Z0 decays into light (u, d, s), c and b flavors. Clear flavor dependences are observed, consistent with expectations based upon previously measured production and decay properties of heavy hadrons. These results were used to test the QCD predictions of Gribov and Lipatov, the predictions of QCD in the modified leading logarithm approximation with the ansatz of local parton-hadron duality, and the predictions of three fragmentation models. The ratios of production of different hadron species were also measured as a function of xp and were used to study the suppression of strange meson, strange and non-strange baryon, and vector meson production in the jet fragmentation process. The light-flavor results provide improved tests of the above predictions, as they remove the contribution of heavy hadron production and decay from that of the rest of the fragmentation process. In addition we have compared hadron and antihadron production as a function of xp in light quark (as opposed to antiquark) jets. Differences are observed at high xp, providing direct evidence that higher-momentum hadrons are more likely to contain a primary quark or antiquark. The differences for pseudoscalar and vector kaons provide new measurements of strangeness suppression for high-xp fragmentation products. ©1999 The American Physical Society.

  • Improved test of the flavor independence of strong interactions Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   59   1999.01( ISSN:15507998

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    Publishing type:Research paper (scientific journal)  

    We present an improved comparison of the strong coupling of the gluon to light [Formula Presented] c, and b quarks, determined from multijet rates in flavor-tagged samples of hadronic [Formula Presented] decays recorded with the SLC Large Detector at the SLAC Linear Collider between 1993 and 1995. Flavor separation among primary [Formula Presented] [Formula Presented] and [Formula Presented] final states was made on the basis of the reconstructed mass of long-lived heavy-hadron decay vertices, yielding tags with high purity and low bias against ⩾ 3-jet final states. We find: [Formula Presented] and [Formula Presented] © 1998 The American Physical Society.

    DOI: 10.1103/PhysRevD.59.012002

  • Measurement of the jet width in γγ collisions and in e+e- annihilation process at TRISTAN Reviewed

    K. Adachi, H. Hayashii, K. Miyabayashi, S. Noguchi, A. Miyamoto, T. Tauchi, et. al. [TOPAZ Collaboration]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   451   256 - 266   1999.01( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    The shape of jets produced in (quasi-) real photon-photon collisions as well as in e+e- annihilation process has been studied with a cone jet finding algorithm, using the data taken with the TOPAZ detector at the TRISTAN e+e- collider at an average center-of-mass energy (√see) of 58 GeV. The results are presented in terms of the jet width as a function of the jet transverse energy (ETjet) as well as a scaled transverse jet energy, XT( = 2ETjet/√s)- The jet width narrows as ETjet increases; however, at the same value of ETjet the jet width in γγ collisions at TRISTAN is significantly narrower than that in γp collisions at HERA. By comparing our results with the data in other reactions, it has been shown that the jet width in γγ, γp, pp̄ collisions as well as the e+e- annihilation process has an approximate scaling behavior as a function of XT. © 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0370-2693(99)00142-2

  • Study of the structure of [formula presented] events and first limits on the anomalous chromomagnetic coupling of the b quark Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   60   1999.01( ISSN:15507998

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    Publishing type:Research paper (scientific journal)  

    The structure of (Formula presented) events was studied using (Formula presented) decays recorded in the SLC Large Detector experiment at SLAC. Three-jet final states were selected and the charge-coupled device-based vertex detector was used to identify two of the jets as b or (Formula presented) Distributions of the gluon energy and polar angle were measured over the full kinematic range for the first time, and compared with perturbative QCD predictions. The energy distribution is potentially sensitive to an anomalous b chromomagnetic moment κ. We measured κ to be consistent with zero and set the first limits on its value: (Formula presented) at 95% C.L. © 1999 The American Physical Society.

    DOI: 10.1103/PhysRevD.60.092002

  • Production of pi+, K+, K0, K*0, phi, p and Lambda0 in hadronic Z0 decays Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review D - Particles, Fields, Gravitation and Cosmology   59   1999.01( ISSN:15507998

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    Publishing type:Research paper (scientific journal)  

    We have measured the differential production cross sections as a function of scaled momentum [Formula Presented] of the identified hadron species [Formula Presented] [Formula Presented] [Formula Presented] [Formula Presented] [Formula Presented], [Formula Presented] and of the corresponding antihadron species in inclusive hadronic [Formula Presented] decays, as well as separately for [Formula Presented] decays into light [Formula Presented] [Formula Presented] [Formula Presented] c and b flavors. Clear flavor dependences are observed, consistent with expectations based upon previously measured production and decay properties of heavy hadrons. These results were used to test the QCD predictions of Gribov and Lipatov, the predictions of QCD in the modified leading logarithm approximation with the ansatz of local parton-hadron duality, and the predictions of three fragmentation models. The ratios of production of different hadron species were also measured as a function of [Formula Presented] and were used to study the suppression of strange meson, strange and non-strange baryon, and vector meson production in the jet fragmentation process. The light-flavor results provide improved tests of the above predictions, as they remove the contribution of heavy hadron production and decay from that of the rest of the fragmentation process. In addition we have compared hadron and antihadron production as a function of [Formula Presented] in light quark (as opposed to antiquark) jets. Differences are observed at high [Formula Presented] providing direct evidence that higher-momentum hadrons are more likely to contain a primary quark or antiquark. The differences for pseudoscalar and vector kaons provide new measurements of strangeness suppression for high-[Formula Presented] fragmentation products. © 1999 The American Physical Society.

    DOI: 10.1103/PhysRevD.59.052001

  • Direct measurement of A<inf>b</inf> and A<inf>c</inf> at the Z0 pole using a lepton tag Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   83   3384 - 3389   1999.01( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    The parity violation parameters Ab and Ac of the Zbb¯ and Zcc¯ couplings have been measured directly, using the polar angle dependence of the Z0-pole polarized cross sections. Bottom and charmed hadrons were tagged via semileptonic decays. Both the muon and electron identification algorithms take advantage of new multivariate techniques, incorporating for the first time information from the SLD Čerenkov Ring Imaging Detector. Based on the 1993–1995 SLD sample of 150 000 Z0 decays produced with highly polarized electron beams, we measure Ab=0.910±0.068(stat)±0.037(syst), Ac=0.642±0.110(stat)±0.063(syst). © 1999 The American Physical Society.

    DOI: 10.1103/PhysRevLett.83.3384

  • Direct measurement of A<inf>b</inf> in Z0 decays using charged kaon Tagging Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   83   1902 - 1907   1999.01( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    We present a direct measurement of the parity-violating asymmetry Ab in the Z0 to bb̄ coupling using a new technique to distinguish the b and b̄ quarks using charged kaons from B decays. The Z0 bosons are produced in e+ē collisions at the SLC with longitudinally polarized electrons. bb̄ events are selected using a secondary vertex mass tag and Ab is determined from the left-right forward-backward asymmetry. From the 1994–1995 data sample, selected from 100 000 hadronic Z0 decays, we obtain Ab = 0.855 ± 0.088stat ± 0.102syst. © 1999 The American Physical Society.

    DOI: 10.1103/PhysRevLett.83.1902

  • Study of baryon production mechanism in e+e- annihilation into hadrons Reviewed

    M. Aoki, R. Itoh, Y. Watanabe, K. Kaneyuki, Y. Ohshima, A. Ochi, T. Tanimori, et. al. [TOPAZ Collaboration]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   440   386 - 392   1998.11( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    The mechanism of baryon-anti-baryon pair production in e+e- annihilation into hadrons has been studied using the TOPAZ detector at the TRISTAN e+e- collider at an average center-of-mass energy of 58 GeV. The distributions of various p̄p correlations were compared with two prominent models: the cluster-fragmentation model and the string-fragmentation model. We rejected the cluster-fragmentation model at the 90% C.L. Furthermore, in the context of the string-fragmentation model, we favor the "popcorn" model, rejecting the "diquark" model, where a diquark is considered to be a fundamental entity, at the 95% C.L. © 1998 Published by Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0370-2693(98)01296-9

  • Direct measurement of parity violation in the coupling of Z0bosons to b quarks using a mass tag and momentum-weighted track charge Reviewed

    K. Abe, et. al. [SLD Collaboration]

    Physical Review Letters   81   942 - 946   1998.01( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    We present a direct measurement of the parity-violation parameter Ab using a self-calibrating track-charge technique. In the SLAC Linear Collider Large Detector (SLD) experiment we observe hadronic decays of Z0 bosons produced in collisions between longitudinally polarized electrons and unpolarized positrons at the SLAC Linear Collider. A sample of bb events is selected using the topologically reconstructed mass of B hadrons. From our 1993–1995 sample of approximately 150 000 hadronic Z0 decays we obtain Ab = 0.911 ± 0.045(stat)±0.045(syst). © 1998 The American Physical Society.

    DOI: 10.1103/PhysRevLett.81.942

  • Charged-particle multiplicities of quark and gluon jets in e+e- annihilation at TRISTAN Reviewed

    K. Nakabayashi, M. Yamauchi, et. al. [TOPAZ Collaboration]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   413   447 - 452   1997.11( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    Charged-particle multiplicity was studied in e+e- annihilation at √s = 57.8 GeV using the TOPAZ detector at TRISTAN. The average multiplicity was 〈nch〉 = 17.64 ± 0.05(stat.) ± 0.41(syst.). It was found that the multiplicity depends on the thrust (T) of an event. From extrapolating this relation to T= 2/3, the multiplicity for three-fold symmetric events was estimated to be 〈nch〉T=2/3 = 23.50+1.25-1.45. From this, the multiplicity ratio between gluon-and quark-jet was estimated to be rg/q = 1.46+0.09-0.13 without any possible bias from jet clustering. © 1997 Elsevier Science B.V.

    DOI: 10.1016/S0370-2693(97)01191-X

  • Measurement of the electromagnetic coupling at large momentum transfer Reviewed

    T. Levine, D. Koltick, B. Howell, E. Shibata, J. Fujimoto, T. Tauchi, et. al. [TOPAZ Collaboration]

    Physical Review Letters   78   424 - 427   1997.01( ISSN:00319007

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    Publishing type:Research paper (scientific journal)  

    We report the first purely electroweak measurement of the strengthening of the electromagnetic coupling, αQED with increasing momentum transfer Q2, by comparing the process e+e-→μ+μ- with the process e+e-→e+e-μ+μ-. The data were accumulated at an average center-of-mass energy <s> = 57.77 GeV using the TOPAZ detector at the TRISTAN e+e- collider. We measure α−1QED(Q2) to change from its known value of α−1QED≅137.0 at Q2 = 0 to 128.5±1.8(stat)±0.7(syst) at Q2 = (57.77 GeV/c)2. This result agrees with electroweak predictions. © 1997 The American Physical Society.

    DOI: 10.1103/PhysRevLett.78.424

  • Measurement of inclusive electron cross-section in gamma gamma collisions at TRISTAN

    Masako Iwasaki

    Nara Women's University   1996.03

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    Publishing type:Doctoral thesis   Kind of work:Single Work  

  • Observation of highly virtual photon-photon collisions to hadrons at TRISTAN Reviewed

    R. Enomoto, et. al. [TOPAZ Collaboration]

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   368   299 - 303   1996.02( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    We have observed highly virtual (Q2 > 1.05 GeV2) photon-photon collisions to hadronic final states at √se+e- = 58 GeV. The integrated luminosity of the data sample was 241 pb-1. Both scattered beam-electrons and scattered beam-positrons were detected using low-angle calorimeters (i.e., both photons were highly virtual, "double-tag"); we obtained 115 hadronic events with an estimated background of 10.2 ± 1.1. The cross section obtained was 4.11 ± 0.66 pb in the 2 < Wγγ < 25 GeV and Qγ,min2 > 2 GeV region, while the lowest order quark-parton model predicted 3.00 pb.

    DOI: 10.1016/0370-2693(95)01583-3

  • A STUDY OF SINGLE-PHOTON PRODUCTION IN E(+)E(-) COLLISIONS AT ROOT-S=58 GEV WITH THE TOPAZ DETECTOR AT TRISTAN Reviewed

    ABE T, FUJII K, SUGIYAMA A, FUJIMOTO J, TAUCHI T, SUZUKI S, KAJIKAWA R, ADACHI K, ABE K, ADACHI I, AOKI M, AOKI M, EMI K, ENOMOTO R, FUJII H, FUJII T, FUJIWARA N, HAYASHII H, HIRANO H, HOWELL B, IKEDA H, IKEDA H, INOUE Y, ITOH R, ITAMI S, IWASAKI H, IWASAKI M, KANEYUKI K, KATO S, KAWABATA S, KICHIMI H, KOBAYASHI M, KOLTICK D, LEVINE I, MAMADA H, MIYABAYASHI K, MIYAMOTO A, NAGAI K, NAKABAYASHI K, NAKANO E, NAKAMURA M, NITOH O, NOGUCHI S, OCHI A, OCHIAI F, OHISHI N, OHNISHI Y, OHSHIMA Y, OKUNO H, OKUSAWA T, SHIBATA E, SUZUKI S, TAKAHASHI K, TAKAHASHI T, TANIMORI T, TERAMOTO Y, TOMOTO M, TSUKAMOTO T, TSUMURA T, UNO S, WATANABE K, WATANABE Y, YAMAMOTO A, YAMAUCHI M

    PHYSICS LETTERS B   361 ( 1-4 )   199 - 206   1995.11( ISSN:0370-2693

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  • A study of single photon production in e+e- collisions at s=58 GeV with the TOPAZ detector at TRISTAN Reviewed

    T. Abe, K. Fujii, A. Sugiyama, J. Fujimoto, T. Tauchi, S. Suzuki, R. Kajikawa, et. al. [TOPAZ Collaboration]

    Physics Letters B   361   199 - 206   1995.11( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    We report a study of single photon production in e+e- collisions at s=58 GeV with the TOPAZ detector at TRISTAN. From data corresponding to an integrated luminosity of 213 pb-1, 5 single photon candidates remained after event selection, which can be compared with the expected 3.1 ννγ and 2.8 background events. These results exclude the selectron mass below 47.2 GeV at the 90% confidence level, if e ̃L and e ̃R are mass-degenerate and the photino is massless. When combined with results from other experiments, this limit improves to 75.0 GeV. © 1995.

    DOI: 10.1016/0370-2693(95)01177-R

  • .GAMMA..GAMMA. Physics at TRISTAN. Reviewed

    Enomoto Ryoji, Hayashii Hisaki, Iwasaki Masako

    一般社団法人日本物理学会, Butsuri   50 ( 10 )   783 - 790   1995.10( ISSN:00290181

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.11316/butsuri1946.50.783

    CiNii Article

    J-GLOBAL

  • MEASUREMENT OF THE TOTAL HADRONIC CROSS-SECTION AND DETERMINATION OF GAMMA-Z INTERFERENCE IN E(+)E(-)-ANNIHILATION Reviewed

    MIYABAYASHI K, ADACHI I, FUJII K, FUJIMOTO J, MIYAMOTO A, SUGIYAMA A, SUZUKI S, TAUCHI T, ABE K, ABE T, ADACHI K, AOKI M, AOKI M, AWA S, EMI K, ENOMOTO R, FUJII H, FUJII T, FUJITA K, FUJIWARA N, HAYASHII H, HOWELL B, IIDA N, IKEDA H, ITOH R, INOUE Y, IWASAKI H, IWASAKI M, KANEYUKI K, KAJIKAWA R, KATO S, KAWABATA S, KICHIMI H, KOBAYASHI M, KOLTICK D, LEVINE I, MINAMI S, MURAMATSU K, NAGAI K, NAKABAYASHI K, NAKANO E, NITOH O, NOGUCHI S, OCHI A, OCHIAI F, OHISHI N, OHNISHI Y, OHSHIMA Y, OKUNO H, OKUSAWA T, SHINOHARA T, SUZUKI S, TAKAHASHI K, TAKAHASHI T, TANIMORI T, TERAMOTO Y, TOOMI N, TSUKAMOTO T, TSUMURA O, UNO S, WATANABE T, WATANABE Y, YAMAGUCHI A, YAMAMOTO A, YAMAUCHI M

    PHYSICS LETTERS B   347 ( 1-2 )   171 - 178   1995.03( ISSN:0370-2693

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  • OBSERVATION OF EXCESS LAMBDA((LAMBDA)OVER-BAR)-PRODUCTION IN 2-PHOTON PROCESSES AT TRISTAN Reviewed

    ENOMOTO R, ABE K, ABE T, ADACHI I, ADACHI K, AOKI M, AOKI M, AWA S, EMI K, FUJII H, FUJII K, FUJII T, FUJIMOTO J, FUJITA K, FUJIWARA N, HAYASHII H, HOWELL B, IIDA N, ITOH R, INOUE Y, IWASAKI H, IWASAKI M, KANEYUKI K, KAJIKAWA R, KATO S, KAWABATA S, KICHIMI H, KOBAYASHI M, KOLTICK D, LEVINE I, MINAMI S, MIYABAYASHI K, MIYAMOTO A, MURAMATSU K, NAGAI K, NAKABAYASHI K, NAKANO E, NITOH O, NOGUCHI S, OCHI A, OCHIAI F, OHISHI N, OHNISHI Y, OHSHIMA Y, OKUNO H, OKUSAWA T, SHINOHARA T, SUGIYAMA A, SUZUKI S, SUZUKI S, TAKAHASHI K, TAKAHASHI T, TANIMORI T, TAUCHI T, TERAMOTO Y, TOOMI N, TSUKAMOTO T, TSUMURA O, UNO S, WATANABE T, WATANABE Y, YAMAGUCHI A, YAMAMOTO A, YAMAUCHI M

    PHYSICS LETTERS B   347 ( 1-2 )   179 - 186   1995.03( ISSN:0370-2693

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  • Measurement of the total hadronic cross section and determination of γ-Z interference in e+e- annihilation Reviewed

    K. Miyabayashi, I. Adachi, K. Fujii, J. Fujimoto, A. Miyamoto, A. Sugiyama, S. Suzuki, T. Tauchi, et. al. [TOPAZ Collaboration]

    Physics Letters B   347   171 - 178   1995.03( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    The total hadronic cross section in e+e- annihilation was measured at s=5.77 GeV to be σh = 143.6 ± 1.5 (stat) ± 3.5 (sys) pb with only the QED corrections. The measurement was based on data corresponding to an integrated luminosity of 90.8 pb-1 accumulated by the TOPAZ detector at TRISTAN. Our data point put stringent constraints on the size of the γ-Z0 interference and the Z0 mass. Combining our data with the OPAL data at LEP, we obtained the coefficient of the interference and the Z0 mass to be Jhad = 0.10 ± 0.26 and Mz = 91.151 ± 0.008 GeV, respectively, in a model-independent analysis. © 1995.

    DOI: 10.1016/0370-2693(95)00038-M

  • MEASUREMENT OF INCLUSIVE PARTICLE SPECTRA AND TEST OF MLLA PREDICTION IN E(+)E(-) ANNIHILATION AT ROOT-S=58 GEV Reviewed

    ITOH R, YAMAUCHI M, YAMAGUCHI A, ABE K, ABE T, ADACHI I, ADACHI K, AOKI M, AOKI M, AWA S, EMI K, ENOMOTO R, FUJII H, FUJII K, FUJII T, FUJIMOTO J, FUJITA K, FUJIWARA N, HAYASHII H, HOWELL B, IIDA N, INOUE Y, IWASAKI H, IWASAKI M, KANEYUKI K, KAJIKAWA R, KATO S, KAWABATA S, KICHIMI H, KOBAYASHI M, KOLTICK D, LEVINE I, MINAMI S, MIYABAYASHI K, MIYAMOTO A, MURATATSU K, NAGAI K, NAKABAYASHI K, NAKANO E, NITOH O, NOGUCHI S, OCHI A, OCHIAI F, OHISHI N, OHNISHI Y, OHSHIMA Y, OKUNO H, OKUSAWA T, SHINOHARA T, SUGIYAMA A, SUZUKI S, SUZUKI S, TAKAHASHI K, TSUMURA O, UNO S, WATANABE T, WATANABE Y, YAMAMOTO A

    PHYSICS LETTERS B   345 ( 3 )   335 - 342   1995.02( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)  

  • Measurement of inclusive particle spectra and test of MLLA prediction in e+e- annihilation at s=58Gev Reviewed

    R. Itoh, M. Yamauchi, A. Yamaguchi, et. al. [TOPAZ Collaboration]

    Physics Letters B   345   335 - 342   1995.02( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    Inclusive momentum spectra are measured for all charged particles and for each of π±, K±, K0 K0, and p p in hadronic events produced via e+e- annihilation at s=58Gev. The measured spectra are compared with QCD predictions based on the modified leading log approximation (MLLA). The MLLA model reproduces the measured spectra well. The energy dependence of the peak positions of the spectra is studied by comparing the measurements with those at other energies. The energy dependence is also well described by the MLLA model. © 1995.

    DOI: 10.1016/0370-2693(94)01685-6

  • Electron Identification using the TOPAZ detector at TRISTAN Reviewed

    M. Iwasaki, E. Nakano, and R. Enomoto

    Nucl.Instr.Meth.   ( A365 )   143   1995

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1016/0168-9002(95)00400-9

  • k0 (K̄0) production in two-photon processes at TRISTAN Reviewed

    R. Enomoto, et. al. [TOPAZ Collaboration]

    Physics Letters B   341   238 - 244   1994.12( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    We have carried out an inclusive measurement of K0(K0) production in two-photon processes at TRISTAN. The mean s was 58 GeV and the integrated luminosity was 199 pb-1. High-statistics Ks samples were obtained under such conditions as no-, anti-electron, and remnant-jet tags. The remnant-jet tag, in particular, allowed us, for the first time, to measure the cross sections separately for the resolved-photon and direct processes. © 1994.

    DOI: 10.1016/0370-2693(94)90315-8

  • Measurement of the forward-backward asymmetries for charm- and bottom-quark pair productions at 〈 S〉 = 58 GeV with electron tagging Reviewed

    E. Nakano, R. Enomoto, M. Iwasaki, et. al. [TOPAZ Collaboration]

    Physics Letters B   340   135 - 142   1994.12( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    We have measured, with electron tagging, the forward-backward asymmetries of charm- and bottom-quark pair productions at 〈 s〉 = 58.01 GeV, based on 23,783 hadronic events selected from a data sample of 197 pb- taken with the TOPAZ detector at TRISTAN. The measured forward-backward asymmetries are AFBc = 0.49±0.20(stat.)±0.08(sys.) and AFBb = -0.64±0.35(stat)±0.13(sys.), which are consistent with the standard model predictions. © 1994.

    DOI: 10.1016/0370-2693(94)91310-2

  • Measurement of the photon structure function F<inf>2</inf>γ and jet production at TRISTAN Reviewed

    K. Muramatsu, H. Hayashii, S. Noguchi, N. Fujiwara, et. al. [TOPAZ Collaboration]

    Physics Letters B   332   477 - 487   1994.07( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    We have measured the photon structure function F2γ in the reaction e+e- → e+e- hadrons for average Q2 values from 5.1 to 338 GeV2 by using data collected by the TOPAZ detector at TRISTAN. The data have been corrected for detector effects and are compared with theoretical expectations based on QCD. The structure function F2γ increases as ln Q2, as expected. A sample of events with one or two distinct jets has been identified in the final state. Although two-jet events can be explained solely by the point-like perturbative part, one-jet events require a significant hadron-like part in addition. © 1994.

    DOI: 10.1016/0370-2693(94)91284-X

  • Measurement of the D cross section using a soft-pion analysis in two-photon processes Reviewed

    R. Enomoto, et. al. [TOPAZ Collaboration]

    Physics Letters B   328   535 - 546   1994.06( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    The differential cross section of dσ(e+e- → e+e- D*± X) dPT was measured using a soft-pion analysis D*± → πs± D0 (D0) at TRISTAN. The average s was 58.7 GeV and the integrated luminosity used in this analysis was 198 pb-, respectively. © 1994.

    DOI: 10.1016/0370-2693(94)91515-6

  • Measurement of the D∗+ cross section in two-photon processes Reviewed

    R. Enomoto, M. Iwasaki, K. Muramatsu, H. Hayashii, A. Miyamoto, R. Itoh, et. al. [TOPAZ Collaboration]

    Physical Review D   50   1879 - 1883   1994.01( ISSN:05562821

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    Publishing type:Research paper (scientific journal)  

    © 1994 The American Physical Society. We have measured the inclusive D* production cross secton in a two-photon collision at the KEK e+e- collider TRISTAN. The mean s of the collider was 57.16 GeV and the integrated luminosity was 150 pb-1. The differential cross section [d(D*)/dPT] was obtained in the PT range between 1.6 and 6.6 GeV and compared with theoretical predictions, such as those involving direct and resolved photon processes.

    DOI: 10.1103/PhysRevD.50.1879

  • Measurement of inclusive electron cross section in gamma gammacollisions at TRISTAN Reviewed

    M. Iwasaki, R. Enomoto, H. Hayashii, E. Nakano, et al. [TOPAZ Collaboration]

    Phys.Lett. B   341   99   1994

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/0370-2693(94)01349-7

  • Measurement of the forward-backward asymmetry of e+e- → cc at √s = 57.95 GeV Reviewed

    E. Nakano, R. Enomoto, et. al. [TOPAZ Collaboration]

    Physics Letters B   314   471 - 476   1993.09( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    Measurements of the forward-backward asymmetry of e+e- → cc events were carried out at a mean √s energy of 57.95 GeV at TRISTAN, KEK. The cc events were tagged either by the full-reconstruction of D*± or the inclusive PT spectrum of πs± from D*± → D0(D0)πs±. The forward-backward asymmetry was measured to be AFBc = -0.49-0.13+0.14 (stat.) ± 0.06 (syst.), consistent with the standard model. © 1993.

    DOI: 10.1016/0370-2693(93)91266-P

  • Measurements of α<inf>s</inf> in e+e- annihilation at /TRISTAN Reviewed

    Y. Ohnishi, I. Adachi, J. Fujimoto, R. Itoh, A. Sugiyama, M. Yamauchi, et. al. [TOPAZ Collaboration]

    Physics Letters B   313   475 - 482   1993.09( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    The strong coupling constant αs was determined from analyses of the thrust, heavy jet mass and, differential 2-jet rate, using e+e- hadronic events at s = 58 GeV with the TOPAZ detector at TRISTAN. The NLLjet Monte Carlo simulation (NLLjet) and analytic formulae based on resummation up to the next-to-leading logarithms combined with O(α2s) calculations were used to evaluate αs. The average αs values at Q2 = (58 GeV)2 from the analyses are αs = 0.125 ± 0.009 for NLLjet and αs = 0.132 ± 0.008 for the resummed analytic formulae. © 1993.

    DOI: 10.1016/0370-2693(93)90022-A

  • Measurement of the inclusive cross section of jets in γγ interactions at TRISTAN Reviewed

    H. Hayashii, A. Miyamoto, M. Iwasaki, S. Noguchi, N. Fujiwara, et. al. [TOPAZ Collaboration]

    Physics Letters B   314   149 - 158   1993.09( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    We have investigated the properties of jet production in almost real γγ collisions at √s=58 GeV with the TOPAZ detector at the TRISTAN e+e- collider. The data were analyzed with a jet-clustering method based on a cone algorithm. The jet rate shows evidence for a hard scattering effect of the hadronic constituents of a photon (resolved photon processes). We have also observed a substantial energy flow in the small-angle region, which is additional evidence for resolved photon processes. We present the transverse momentum dependence of the inclusive jet and two-jet cross sections and compare them with different model predictions. © 1993.

    DOI: 10.1016/0370-2693(93)91335-K

  • Search for a narrow resonance in e+e- collisions between E<inf>CM</inf> = 58 and 60 GeV Reviewed

    K. Abe, et. al. [TOPAZ Collaboration]

    Physics Letters B   304   373 - 380   1993.04( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    We carried out the energy scan between ECM = 58 and 60 GeV at the TRISTAN e+e- collider to search for the possible narrow resonance suggested by the L3 experiment at LEP. The total cross sections are measured for γγ, multihadron, e+e- and μ + μ- production at ten energy points covering this energy range almost uniformly. The results are in good agreement with the Standard Model predictions, and 95% confidence level upper limits are set to Γee × BR of the hypothetical scalar and tensor resonances. © 1993.

    DOI: 10.1016/0370-2693(93)90311-5

  • Cross sections and charge asymmetries for e+e-→μ+μ- and e+e-→τ+τ-reactions at s=52-61.4 GeV Reviewed

    B. Howell, D. Koltick, T. Tauchi, A. Miyamoto, H. Kichimi, K. Fujii, et. al. [TOPAZ Collaboration]

    Physics Letters B   291   206 - 212   1992.09( ISSN:03702693

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    Publishing type:Research paper (scientific journal)  

    The process e+e-→μ+μ-and e+e- have been studied in the energy range s=52-61.4 GeV, using the TOPAZ detector at TRISTAN. From an integrated luminosity of L = 74.0 pb-1, lowest-order cross sections and forward-backward asymmetries are measured to be 〈σμμ〈 = 25.4±0.9±1.2 pb, 〈Aμμ〉 = (-32.2±3.1±1.1)%, 〈σττ〉 = 27.1±1.1±1.2 pb, 〈Aττ〉 = (-33.9±4.9±1.0)%, at an average energy of s〉=57.87 GeV. From the measured assymetry we derive axial vector couplings of acaμ=0.96±0.09±0.01,and acaτ=1.01±0.14±0.01±. These results are consistent with standard model expectations. Lower limits in the range 2-5 TeV (95%CL)are placed on compositeness scale parameters for leptons. © 1992.

    DOI: 10.1016/0370-2693(92)90145-T

▼display all

MISC

  • R&D of the KEK Linac Accelerator Tuning based on Reinforcement Study Reviewed

    久野彰浩, 岩崎昌子, 岩崎昌子, 岩崎昌子, 岩崎昌子, 佐藤政則, 佐武いつか, 中島悠太, 武村紀子, 長原一, 中野貴志, 中野貴志

    日本物理学会講演概要集(CD-ROM)   76 ( 1 )   2021( ISSN:2189-079X

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    Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    J-GLOBAL

  • SuperKEKBビーム最終集束用超伝導電磁石システム(9‐4)―Phase‐II試験運転における冷凍システム用モニタリングシステムの運用― Reviewed

    青木香苗, 大内徳人, ZONG Zhanguo, 有本靖, WANG Xudong, 山岡広, 川井正徳, 近藤良也, 槙田康博, 遠藤友成, 廣瀬雅哉, 岩崎昌子, 中村卓也

    低温工学・超電導学会講演概要集   97th   123   2018.11( ISSN:0919-5998

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    Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    J-GLOBAL

Presentations

  • Estimation of critical parameters for the KEK linac tuning using explainable AI algorithm for EBES experiment Domestic conference

    Kosuke UemuraA, Masako IwasakiA,B,C, Fusashi MiyaharaD, Taikan SueharaE, Yuta Nakashima, Noriko Takemura, Hajime Nagahara, Masanori Satoh, Itsuka Satake, Takashi Nakano, Yosuke Takubo, Tomoya Iizawa, Akimasa Ishikawa, Hiroshi Iwase, Yuichi Okayasu, Hidetoshi Otono, Yasuhiro Sakaki, Yuta Shimasaki, Takumi Seino, Yu Morikawa, Takahiro Fusayasu, Toshiyuki Ono

    2025 Spring Meeting, The Physical Society of Japan  2025.03 

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    Presentation type:Oral presentation (general)  

  • R&D of the EM Calorimeter Energy Calibration with Machine Learning based on the low-level features of the Cluster Domestic conference

    S. Morimasa, M. Iwasaki, T. Suehara, J. Tanaka, M. Saito, Y. Nakashima, N. Takemura, T. Nakano

    Flavor Physics Workshop 2024 (FPWS2024)  2024.12 

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    Presentation type:Oral presentation (general)  

  • Challenges in Accelerator Physics Invited International conference

    Masako Iwasaki

    Future of Artificial Intelligence for Science in Japan (FAIRS Japan 2024)  2024.12 

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    Presentation type:Oral presentation (keynote)  

  • R&D of the EM Calorimeter Energy Calibration with Machine Learning based on the low-level features of the Cluster Invited International conference

    S. Morimasa, M. Iwasaki, T. Suehara, J. Tanaka, M. Saito, Y. Nakashima, N. Takemura, T. Nakano

    International Workshop on Future Linear Colliders (LCWS2024)  2024.07 

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    Presentation type:Poster presentation  

  • Development of Accelerator Tuning System Using Machine Learning : Development of Accelerator Simulator Invited International conference

    R. Watarai, M.Iwasaki, Y. Nakashima, N. Takemura, H. Nagahara, T. Nakano, M. Satoh, I. Satake

    International conference on MACHINE LEARNING PHYSICS (MLPhys)  2023.11 

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    Presentation type:Poster presentation  

  • Development of accelerator simulator with GAN Domestic conference

    Ryu Watarai, Masako Iwasaki, Yuta Nakashima, Noriko Takemura, Hajime Nagahara, Takashi Nakano, Masanori Satoh, Itsuka Satake

    2023 Spring Meeting, The Physical Society of Japan  2023.03 

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  • 機械学習を適用したKEK電子陽電子入射器ビーム調整のための開発 Invited Domestic conference

    岩崎 昌子

    加速器・ビーム物理の機械学習ワークショップ  2023.03 

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    Presentation type:Oral presentation (invited, special)  

  • R&D of the Data Processing with Sparse Sampling using Machine Learning for High Energy Experiments Domestic conference

    C. Kato, M. Iwasaki, H. Nagahara, M. Yoshida, T. Suehara, S. Yamada, Y. Nakashima, N. Takemura, T. Nakano

    ML at HEP workshop  2023.02 

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    Presentation type:Poster presentation  

  • Overview of AI application in Accelerator Invited Domestic conference

    Masako Iwasaki

    KEK IINAS 5th International School on Beam Dynamics and Accelerator Technology (ISBA22)  2022.11 

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    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

  • 機械学習 Invited Domestic conference

    岩崎 昌子

    Flavor Physics Workshop 2022  2022.11 

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  • 素粒子物理学実験への機械学習の適用研究 Invited Domestic conference

    岩崎 昌子

    JHPCN: 学際大規模情報基盤共同利用・共同研究拠点 第14回 シンポジウム  2022.07 

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    Presentation type:Poster presentation  

  • GANを用いた加速器シミュレータ開発のための基礎研究 Domestic conference

    度会 龍, 岩崎昌子, 佐藤政則, 佐武いつか, 中島悠太, 武村紀子, 長原 一, 中野貴志

    ML@HEP  2022.07 

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  • Application of the Machine Learning to the Collider Experiments. Invited International conference

    Masako Iwasaki, Hajime Nagahara, Yuta Nakashima, Noriko Takemura, Takashi Nakano, Taikan Suehara

    HeKKSaGOn (German-Japanese University Alliance) Data Science Workshop  2021.09 

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    Presentation type:Oral presentation (general)  

  • R&D of the Energy Calibration for the SiD EM Calorimeter based on Machine Learning Invited International conference

    M. Iwasaki, Y. Naka, J. Brau, M. Breidenbach, K. Morikawa, H. Nagahara, Y. Nakashima, A. L. Steinhebel, J. F. Strube, N. Takemura

    The 3rd edition of the Calorimetry for High Energy Frontier conf. (CHEF 2019)  2019.11 

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    Presentation type:Oral presentation (general)  

  • Application of the Machine Learning to the collider experiments Invited International conference

    Masako Iwasaki

    International Workshop on Future Linear Colliders (LCWS 2019)  2019.10 

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    Presentation type:Oral presentation (general)  

  • R&D of the flavor-tag method based on Machine Learning for high energy experiments Invited International conference

    KISHIDA Naoya, IWASAKI Masako, NAKASHIMA Yuta, TAKEMURA Noriko, NAGAHARA Hajime, NAKANO Takashi

    International Workshop on Future Linear Colliders (LCWS 2019)  2019.10 

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    Presentation type:Oral presentation (general)  

  • R&D of the KEK Linac Accelerator Tuning using Machine Learning Domestic conference

    H. Joan, M. Iwasaki, M. Satoh, I. Satake, Y. Nakashima, N. Takemura, H. Nagahara, T. Nakano

    2019 Autumn Meeting, The Physical Society of Japan  2019.09 

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    Presentation type:Oral presentation (general)  

  • Study of the decay process of B0→γγ in the Belle experiment. -Development of new analysis method using Machine Learning- Domestic conference

    N. Kishida, M. Iwasaki, A. Ishikawa, Y. Nakashima, N. Takemura, H. Nagahara, T. Nakano, Belle Collab., RCNP DNN project

    2019 Autumn Meeting, The Physical Society of Japan  2019.09 

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  • R&D of the KEK Linac Accelerator Tuning using Machine Learning Domestic conference

    H. Joan, M. Iwasaki, M. Satoh, I. Satake, Y. Nakashima, N. Takemura, H. Nagahara, T. Nakano

    16th Annual Meeting of Particle Accelerator Society of Japan  2019.08 

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    Presentation type:Poster presentation  

  • 素粒子実験への機械学習の適用 Invited Domestic conference

    岩崎 昌子

    関西B実験4年生・M1対象勉強会  2019.07 

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  • R&D of the Energy Calibration based on Machine Learning for SiD ECL  Domestic conference

    M. Iwasaki, K. Morikawa, H. Yamamura, J. Strube, J. Brau, A. Steinhebel, M. Breidenbach

    74th Annual Meeting, The Physical Society of Japan  2019.03 

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    Presentation type:Oral presentation (general)  

  • R&D of the Flavor-tag Method based on Machine Learning for Collider Experiments  Domestic conference

    KISHIDA Naoya, IWASAKI Masako, NAKASHIMA Yuta, TAKEMURA Noriko, NAGAHARA Hajime, NAKANO Takashi

    74th Annual Meeting, The Physical Society of Japan  2019.03 

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    Presentation type:Oral presentation (general)  

  • R&D of The Energy Calibration based on Machine Learning for the SiD ECL International conference

    K. Morikawa, M. Iwasaki, H. Yamamura, J. Strube, J. Brau, A. Steinhebel, M. Breidenbach

    The 2nd KMI school (KMI school 2019)  2019.02 

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    Presentation type:Poster presentation  

  • R&D of the Flavor-tag Method based on Machine Learning for High Energy Experiments International conference

    KISHIDA Naoya, IWASAKI Masako, NAKASHIMA Yuta, TAKEMURA Noriko, NAGAHARA Hajime, NAKANO Takashi

    The 2nd KMI school (KMI school 2019)  2019.02 

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    Presentation type:Poster presentation  

  • The SuperKEKB Accelerator : Construction and Operations Invited International conference

    Masako Iwasaki

    International Symposium in Honor of Professor Nambu for the 10th Anniversary of his Nobel Prize in Physics  2018.12 

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    Presentation type:Oral presentation (general)  

  • Machine Learning Application for Experimental Particle Physics : Activities in Osaka Invited International conference

    Masako Iwasaki

    Osaka-Groningen Mini Workshop : Data Science and Nuclear / Elementary Particle Physics  2018.12 

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    Presentation type:Oral presentation (general)  

  • Introduction of the Belle II Japan Domestic conference

    Masako Iwasaki

    2018.06 

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  • Belle II Status and Prospects Invited International coauthorship International conference

    Masako Iwasaki

    Asian Linear Collider Workshop 2018  2018.05 

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    Presentation type:Oral presentation (invited, special)  

  • Nuclear Physics Session Summary Invited International conference

    Masako Iwasaki

    Data Workshop Osaka-Groningen  2018.03 

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    Presentation type:Oral presentation (invited, special)  

  • Machine Learning Application to SuperKEKB / Belle2 in Osaka Invited International conference

    Masako Iwasaki

    Data Workshop Osaka-Groningen  2018.03 

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    Presentation type:Oral presentation (general)  

  • EPICS Education at Osaka City University Domestic conference

    Masako Iwasaki

    2017.12 

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    Presentation type:Oral presentation (general)  

  • QCS冷却システムの開発 –モニタリングシステム- Domestic conference

    青木 香苗, ..., 岩崎 昌子, 他10名

    第1回超電導応用研究会シンポジウム  2017.10 

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    Presentation type:Oral presentation (general)  

  • Tool development for the Detector-Control R&D and Education Based on RaspberryPi and Arduino  Domestic conference

    M. Iwasaki, N. Yamamoto, N. Kamikubota

    2017 Autumn Meeting, The Physical Society of Japan  2017.09 

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    Presentation type:Oral presentation (general)  

  • CDC検出器 Domestic conference

    岩崎 昌子

    関東B実験4年生・M1対象勉強会  2017.06 

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  • EPICS Education at University Invited International conference

    Masako Iwasaki

    Spring 2017 EPICS Collaboration Meeting  2017.05 

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    Presentation type:Oral presentation (general)  

  • Install EPICS on Raspberry-Pi Invited International conference

    Masako Iwasaki

    Spring 2017 EPICS Collaboration Meeting  2017.05 

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  • The Belle II Detector Domestic conference

    Masako Iwasaki

    2017.05 

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    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

  • The Belle II Detector Invited Domestic conference

    Masako Iwasaki

    Flavor Physics Workshop 2016  2016.10 

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    Presentation type:Oral presentation (invited, special)  

  • The SuperKEKB Accelerator Invited Domestic conference

    Masako Iwasaki

    Flavor Physics Workshop 2015  2015.10 

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  • The Construction Status of the SuperKEKB Control System Invited International conference

    M. Iwasaki, A. Akiyama, K. Furukawa, H. Kaji, T. Naito, T.T. Nakamura, J.-I. Odagiri, S. Sasaki, T. Aoyama, M. Fujita, T. Nakamura, K. Yoshii, K. Asano, M. Hirose, Y. Iitsuka, N. Yoshifuji

    15th International Conference on Accelerator & Large Experimental Physics Control Systems (ICALEPCS 2015)  2015.10 

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    Presentation type:Oral presentation (invited, special)  

  • Development and application of VME module with FMC interface(1) - Design of the VME module and application to Spring-8 - Domestic conference

    ABE Toshinori, IKENO Masahiro, SHOJI Masayoshi, IWASAKI Masako, et. al.

    12th Annual Meeting of Particle Accelerator Society of Japan  2015.08 

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    Presentation type:Poster presentation  

  • Development and application of VME module with FMC interface(3) - Evaluation tests for SuperKEKB - Domestic conference

    SASAKI Shinya, AKIYAMA Atsuyoshi, IWASAKI Masako, ABE Toshinori, et. al.

    12th Annual Meeting of Particle Accelerator Society of Japan  2015.08 

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    Presentation type:Poster presentation  

  • Development and application of VME module with FMC interface(2) - Application to SuperKEKB - Domestic conference

    IWASAKI Masako, SASAKI Shinya, AKIYAMA Atsuyoshi, ABE Toshinori

    12th Annual Meeting of Particle Accelerator Society of Japan  2015.08 

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    Presentation type:Poster presentation  

  • Superconducting Magnet System for the Interaction Region of SuperKEKB (6-5) - Monitoring / Interlock System -  Domestic conference

    Masako Iwasaki

    90th (2014 Autumn) Conference, Cryogenics and Superconductivity Society of Japan  2014.11 

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    Presentation type:Oral presentation (general)  

  • Design and Status of the SuperKEKB Accelerator Control Network System Domestic conference

    Masako Iwasaki

    Design and Status of the SuperKEKB Accelerator Control Network System  2014.08 

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    Presentation type:Oral presentation (general)  

  • Design and Status of the SuperKEKB Accelerator Control Network System Invited International conference

    Masko Iwasaki

    The 5th International Particle Accelerator Conference (IPAC'14)  2014.06 

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    Presentation type:Poster presentation  

  • Design and Construction Status of the SuperKEK Accelerator Invited Domestic conference

    Masako Iwasaki

    69th Annual Meeting, The Physical Society of Japan  2014.03 

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    Presentation type:Oral presentation (invited, special)  

  • Development of the remote monitoring for the SuperKEKB cryogenic system using EPICS Domestic conference

    Masko Iwasaki

    8th (2013 Autumn) Conference, Cryogenics and Superconductivity Society of Japan  2013.12 

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    Presentation type:Oral presentation (general)  

  • Development of the control system for the SuperKEKB superconducting magnet field measurement using EPICS  Domestic conference

    Masko Iwasaki

    8th (2013 Autumn) Conference, Cryogenics and Superconductivity Society of Japan  2013.12 

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    Presentation type:Oral presentation (general)  

  • Design and Status of the SuperKEKB Accelerator Control Network System Invited International conference

    Masko Iwasaki

    14th International Conference on Accelerator & Large Experimental Physics Control Systems (ICALEPCS 2013)  2013.10 

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    Presentation type:Poster presentation  

  • Design and Status of the SuperKEKB Accelerator Control System Invited International conference

    Masko Iwasaki

    14th International Conference on Accelerator & Large Experimental Physics Control Systems (ICALEPCS 2013)  2013.10 

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    Presentation type:Oral presentation (invited, special)  

  • Construction of the SuperKEKB Control Network Wireless LAN System into the Accelerator Tunnel Domestic conference

    Masko Iwasaki

    10th Annual Meeting of Particle Accelerator Society of Japan  2013.08 

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    Presentation type:Oral presentation (general)  

  • Development of the Superconducting Quadrupole Magnet for SuperKEKB Final Focusing System  Domestic conference

    Masko Iwasaki

    85th (2011 Autumn) Conference, Cryogenics and Superconductivity Society of Japan  2011.11 

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    Presentation type:Oral presentation (general)  

  • Development of the Superconducting Quadrupole Magnet for the SuperKEKB Final Focusing System Invited International conference

    Masko Iwasaki

    22nd International Conference on Magnet Technology (MT-22)  2011.09 

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    Presentation type:Poster presentation  

  • The Final Focusing Superconducting Magnets for SuperKEKB  Domestic conference

    Masko Iwasaki

    8th Annual Meeting of Particle Accelerator Society of Japan  2011.08 

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    Presentation type:Oral presentation (general)  

  • Development of the Superconducting Quadrupole Magnet for SuperKEKB Final Focusing System Domestic conference

    Masko Iwasaki

    84th (2011 Spring) Conference, Cryogenics and Superconductivity Society of Japan  2011.05 

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    Presentation type:Oral presentation (general)  

  • The SuperKEKB Accelerator Status Invited International conference

    Masko Iwasaki

    35th International Conference on High Energy Physics (ICHEP2010)  2010.07 

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    Presentation type:Oral presentation (invited, special)  

  • Evaluation of the Detector BG for SuperKEKB Invited International conference

    Masako Iwasaki

    The 1st International Particle Accelerator Conference, IPAC'10  2010.05 

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    Presentation type:Poster presentation  

  • Design of the SuperKEKB IR  Invited Domestic conference

    Masko Iwasaki

    65th Annual Meeting, The Physical Society of Japan   2010.03 

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    Presentation type:Oral presentation (invited, special)  

  • IP Beam Size Measurement During Collisions at SuperKEKB Invited International conference

    Masko Iwasaki

    2009 IEEE Nuclear Science Symposium and Medical Imaging Conference  2009.10 

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    Presentation type:Poster presentation  

    Venue:Orlanda, Florida, United States  

  • Rare Hadronic B-meson decays Invited International coauthorship International conference

    Masko Iwasaki

    9th International Workshop on Heavy Quarks and Leptons (HQL 2008)  2008 

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    Presentation type:Oral presentation (general)  

  • Measurements of charmless B-decays at Belle Invited International coauthorship International conference

    Masko Iwasaki

    34th International Conference on High Energy Physics (ICHEP 2008)  2008 

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    Presentation type:Oral presentation (general)  

  • T2K proton beam handling and failure studies International coauthorship International conference

    Masko Iwasaki

    Joint Meeting of Pacific Region Particle Physics Communities (APS-DPF2006, JPS2006)  2006.10 

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    Presentation type:Oral presentation (general)  

    Venue:Honolulu, Hawaii, USA  

  • Measurements of B -> sl+l- / missing energy at B-factories Invited International coauthorship International conference

    Masko Iwasaki

    4th International Workshop on CKM Unitarity Triangle (CKM 2006)  2006 

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    Presentation type:Oral presentation (general)  

  • Proton Beam Monitors Overview Invited International coauthorship International conference

    Masako Iwasaki

    3rd International Workshop on Nuclear and Particle Physics (NP04)  2004.08 

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    Presentation type:Oral presentation (general)  

    Venue:KEK, Japan  

  • Recent Results from Belle  Invited Domestic conference

    Masako Iwasaki

    2004 Autumn Meeting, The Physical Society of Japan  2004 

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    Presentation type:Oral presentation (invited, special)  

  • Observation of B to K*ll and related modes Invited International coauthorship International conference

    Masako Iwasaki

    39th Rencontres De Moriond On Electroweak Interactions And Unified Theories  2004 

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    Presentation type:Oral presentation (general)  

  • Measurements of the Electroweak Penguin Processes B -> Xs l+l- B -> Xs gamma Invited International coauthorship International conference

    Masako Iwasaki

    11th International Conference on Supersymmetry And the Unification Of Fundamental Interactions (SUSY 2003)  2003 

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    Presentation type:Oral presentation (general)  

  • Full Simulation Studies for the Silicon Tracker Invited International coauthorship International conference

    Masako Iwasaki

    International Workshop on Linear Colliders (LCWS 2002)  2002 

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    Presentation type:Oral presentation (general)  

  • ROOT at the LCD Invited International coauthorship International conference

    Masako Iwasaki

    3rd International HENP ROOT Users Workshop (ROOT2001)  2001 

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    Presentation type:Oral presentation (general)  

  • LCD Root analysis and simulation tools Invited International coauthorship International conference

    Masako Iwasaki

    5th International Linear Collider Workshop (LCWS 2000)  2000 

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    Presentation type:Oral presentation (general)  

  • Study of the top-quark production and decay vertices with LCD Invited International coauthorship International conference

    Masako Iwasaki

    5th International Linear Collider Workshop (LCWS 2000)  2000 

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    Presentation type:Oral presentation (general)  

  • Measurements of Aq (Ab, Ac, As) Invited International coauthorship International conference

    Masako Iwasaki

    30th International Conference on High Energy Physics (ICHEP 2000)  2000 

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    Presentation type:Oral presentation (general)  

  • Heavy Flavor Physics at the SLD experiment  Invited Domestic conference

    Masako Iwasaki

    54th Annual Meeting, The Physical Society of Japan  1999 

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    Presentation type:Oral presentation (invited, special)  

  • Top Quark Reconstruction in 4 and 6 jet modes with Fast MC Simulation Invited International coauthorship International conference

    Masako Iwasaki

    4th International Linear Collider Workshop (LCWS 99)  1999 

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    Presentation type:Oral presentation (general)  

  • Measurements of Z0 to heavy-quark couplings at SLD Invited International coauthorship International conference

    Masako Iwasaki

    American Physical Society Division of Particles and Fields (DPF 99)  1999 

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    Presentation type:Oral presentation (general)  

  • Study of Open-Charm Production in gamma gamma Collisions Invited International coauthorship International conference

    Masako Iwasaki

    10th International Workshop on gamma gamma Collisions (Photon 95),  1995 

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    Presentation type:Oral presentation (general)  

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Works

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Grant-in-Aid for Scientific Research

  • Exploration of the particle physics frontier at the Super B-factory and cultivation o f young researchers

    Fund for the Promotion of Joint International Research (International Leading Research )  2028

  • Exploration of the particle physics frontier at the Super B-factory and cultivation o f young researchers

    Fund for the Promotion of Joint International Research (International Leading Research )  2027

  • Exploration of the particle physics frontier at the Super B-factory and cultivation o f young researchers

    Fund for the Promotion of Joint International Research (International Leading Research )  2026

  • Innovative advances in particle physics through machine learning

    Grant-in-Aid for Transformative Research Areas (A)  2025

  • Exploration of the particle physics frontier at the Super B-factory and cultivation o f young researchers

    Fund for the Promotion of Joint International Research (International Leading Research )  2025

  • Innovative advances in particle physics through machine learning

    Grant-in-Aid for Transformative Research Areas (A)  2024

  • Exploration of the particle physics frontier at the Super B-factory and cultivation o f young researchers

    Fund for the Promotion of Joint International Research (International Leading Research )  2024

  • 機械学習による素粒子物理学の革新的な発展

    Grant-in-Aid for Transformative Research Areas  2023

  • スーパーBファクトリー研究による素粒子物理学フロンティアの開拓と若手研究者の育成

    Fund for the Promotion of Joint International Research / Fostering Joint International Research (A)  2023

  • 機械学習による素粒子物理学の革新的な発展

    Grant-in-Aid for Transformative Research Areas  2022

  • Probing new physics through precision measurement of anomalous magnetic moment of tau lepton

    Grant-in-Aid for Scientific Research(A)  2011.04

  • Precision Measurements of Flavor Changing Neutral Current Decays of B Mesons

    Grant-in-Aid for Scientific Research(A)  2006

  • Study of Dark Energy based on a weak lensing survey

    Grant-in-Aid for Scientific Research on Priority Areas  2006

  • J-PARC神岡間ニュートリノ振動実験のための陽子ビームモニターの開発

    Grant-in-Aid for Young Scientists(B)  2004

  • Bファクトリーを用いた質量起源の探求

    Grant-in-Aid for Scientific Research on Priority Areas  2002

  • Precision Measurements of B Meson Decays and Search for Supersymmetry

    Grant-in-Aid for Scientific Research(A)  2001

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Incentive donations / subsidies

  • スパースセンシングを用いた素粒子実験データプロセス機構の開発

    大阪公立大学  女性研究者 研究実践力強化支援プログラム(RESPECT)   2022.07

  • 機械学習を用いた物理学実験シミュレーターの基礎開発

    文部科学省  文部科学省補助事業「ダイバーシティ研究環境実現イニシアティブ(牽引型)」  2022.06

  • 機械学習を用いた物理学実験用機器制御技術の開発

    文部科学省  2021.07

  • 機械学習を用いた物理学実験データ処理技術の開発

    文部科学省  2020.07

  • 素粒子・原子核実験および関連分野への深層学習の適用と発展

    山田科学振興財団  2019.10

  • 物理学実験への深層学習の適用研究:データ処理技術開発および教育教材開発

    文部科学省  2019.07

  • 素粒子物理学実験への深層学習の適用研究 -物理データ解析技術および加速器制御技術の開発-

    大阪市立大学  2019.04

  • 素核物理学実験における深層学習の適用研究:データ解析技術開発および教育教材開発

    文部科学省  2018.06

  • 素核物理学実験のための基盤実験技術開発および教育教材開発

    文部科学省  2017.11

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Charge of on-campus class subject

  • 物理学特別研究2A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究1A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習2A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習1A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究5A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究4A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究3A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習5A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習4A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習3A

    2024   Intensive lecture   Graduate school

  • 統計解析

    2024   Weekly class   Undergraduate

  • 現代物理学

    2024   Weekly class   Undergraduate

  • 海外特別研究1

    2024   Intensive lecture   Graduate school

  • 物理学特別研究2B

    2024   Intensive lecture   Graduate school

  • 物理学特別研究1B

    2024   Intensive lecture   Graduate school

  • 物理学特別演習2B

    2024   Intensive lecture   Graduate school

  • 物理学特別演習1B

    2024   Intensive lecture   Graduate school

  • 海外特別研究5

    2024   Intensive lecture   Graduate school

  • 海外特別研究5

    2024   Intensive lecture   Graduate school

  • 物理学特別研究5B

    2024   Intensive lecture   Graduate school

  • 物理学特別研究4B

    2024   Intensive lecture   Graduate school

  • 物理学特別研究3B

    2024   Intensive lecture   Graduate school

  • 物理学特別演習5B

    2024   Intensive lecture   Graduate school

  • 物理学特別演習4B

    2024   Intensive lecture   Graduate school

  • 物理学特別演習3B

    2024   Intensive lecture   Graduate school

  • 基礎物理学実験2B

    2024   Weekly class   Graduate school

  • 海外特別研究

    2024   Intensive lecture   Undergraduate

  • 物理学実験SB

    2024   Weekly class   Undergraduate

  • 物理学講読

    2024   Weekly class   Undergraduate

  • 特別実験・特別理論演習

    2024   Intensive lecture   Undergraduate

  • 宇宙・素粒子実験物理学B

    2023   Weekly class   Graduate school

  • 基礎物理学実験2B

    2023   Weekly class   Graduate school

  • 統計解析

    2022   Weekly class   Undergraduate

  • 基礎物理学実験II

    2022   Weekly class   Undergraduate

  • 基礎物理学実験II

    2021     Undergraduate

  • 基礎物理学実験I

    2021     Undergraduate

  • 宇宙・素粒子実験物理学II

    2021     Graduate school

  • 基礎物理学実験II

    2020     Undergraduate

  • 基礎物理学実験I

    2020     Undergraduate

  • 基礎物理学実験I

    2019     Undergraduate

  • 宇宙・素粒子実験物理学II

    2019     Graduate school

  • 宇宙・素粒子実験物理学II

    2018     Graduate school

  • 基礎物理学実験II

    2018     Undergraduate

  • 基礎物理学実験I

    2018     Undergraduate

  • 基礎物理学実験I

    2017     Undergraduate

  • 基礎物理学実験II

    2017     Undergraduate

  • 宇宙・素粒子実験物理学II

    2017     Graduate school

  • 入門物理学実験

    2016     Undergraduate

  • 基礎物理学実験I

    2016     Undergraduate

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Charge of off-campus class subject

  • 物理学実験I

Social Activities ⇒ Link to the list of Social Activities

  • 巨大加速器を使った素粒子実験:"ミニ宇宙"をつくる・探る

    Role(s): Lecturer

    Type: Lecture

    日本物理学会大阪支部  2024年度公開シンポジウム 量子ビームが切り拓く未来  2024.11

  • 巨大加速器を使った素粒子実験をしろう:"ミニ宇宙"創成の最前線

    Role(s): Lecturer

    Type: Lecture

    大阪公立大学  大阪公立大学市民セミナー 21世紀の物理学 2024  2024.11

  • 大阪公立大学ラボツアー(研究室見学): 大阪府立住吉高等学校

    Role(s): Lecturer

    Type: Other

    2024.07

  • 国際研究プロジェクトとその研究者たち

    Role(s): Lecturer

    東北大学 研究推進・支援機構 知の創出センター、東北大学大学院理学研究科  2019.10

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    Audience: High school students, University students

  • 第14回女子中高生のための関西科学塾:講演「素粒子実験を知ろう -巨⼤加速器でつくるミニ宇宙-」

    Role(s): Lecturer

    一般社団法人 関西科学塾コンソーシアム  大阪市立大学  2019.07

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    Audience: Junior high school students, High school students, Parents/Guardians

  • 市民特別セミナー2018講演会「宇宙の謎を解く鍵 -南部先生が見つけたもの-」

    Role(s): Host

    Type: Lecture

    2018.12

  • 研究室見学 : 大阪府立高津高等学校 体験型進路学習(GLHS事業)

    Role(s): Lecturer

    2018.11

  • 平成29年度産学官連携ウィメンズイノベーションフェア:ポスター展示「加速器を用いた素粒子物理学実験」

    Role(s): Lecturer

    2018.03

  • 研究室見学 : 大阪府立高津高等学校 体験型進路学習(GLHS事業)

    Role(s): Lecturer

    2017.07

  • 大阪府立高津高校 進路講演会(模擬講義)「加速器を使った素粒子物理学実験」

    Role(s): Lecturer

    Type: Visiting lecture

    2016.11

  • 大阪府立高津高校 SSHサマーサイエンスツアー事前学習「SuperKEKB/BelleII実験の紹介」

    Role(s): Lecturer

    2016.07

  • KEK高校生等実習受入事業:栃木県立宇都宮女子高等学校 「研究者への道」

    Role(s): Lecturer

    2015.07

  • KEK高校生等実習受入事業:栃木県立宇都宮女子高等学校 「研究者への道」

    Role(s): Lecturer

    2015.07

  • 数物連携宇宙研究機構女子中高生支援事業「家族でナットク!理系最前線」

    Role(s): Consultant, Logistic support

    2009.08

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