Evidence of gamma(1S) -> J/Psi +chi(c1) and search for double-charmonium production in gamma(1S) and gamma(2S) decays
Belle Collaboration
刊名PHYSICAL REVIEW D
2014
卷号90期号:11
关键词BELLE IDENTIFICATION KEKB QCD
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.90.112008
通讯作者Yang, SD (reprint author), Peking Univ, Beijing 100871, Peoples R China.
英文摘要Using data samples of 102 x 10(6) gamma(1S) and 158 x 10(6) gamma(2S) events collected with the Belle detector, a first experimental search has been made for double-charmonium production in the exclusive decays gamma(1S, 2S) --> J/psi(psi') + X, where X = eta(c).chi(cJ) (J = 0, 1, 2), eta(c)(2S), X(3940), and X(4160). No significant signal is observed in the spectra of the mass recoiling against the reconstructed J/psi or psi' except for the evidence of chi(c1) production with a significance of 4.6 sigma for gamma(1S) -> J/psi + chi(c1). The measured branching fraction B(gamma(1S) -> J/psi + chi(c1)) is [3.90 +/- 1.21 (stat) +/- 0.23(syst) x 10(-6). The 90% C.L. upper limits on the branching fractions of the other modes having a significance of less than 3 sigma are determined. These results are consistent with theoretical calculations using the nonrelativistic QCD factorization approach.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000348730800001
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213854
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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Belle Collaboration. Evidence of gamma(1S) -> J/Psi +chi(c1) and search for double-charmonium production in gamma(1S) and gamma(2S) decays[J]. PHYSICAL REVIEW D,2014,90(11).
APA Belle Collaboration.(2014).Evidence of gamma(1S) -> J/Psi +chi(c1) and search for double-charmonium production in gamma(1S) and gamma(2S) decays.PHYSICAL REVIEW D,90(11).
MLA Belle Collaboration."Evidence of gamma(1S) -> J/Psi +chi(c1) and search for double-charmonium production in gamma(1S) and gamma(2S) decays".PHYSICAL REVIEW D 90.11(2014).
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