An improved limit for ΓeeΓee of X(3872)X(3872) and ΓeeΓee measurement of ψ(3686)
BESIII Collaboration
刊名PHYSICS LETTERS B
2015
卷号749页码:414-420
关键词X(3872) psi(3686) Gamma(ee) Charmonium spectroscopy BESIII
学科分类Astronomy & Astrophysics; Physics
DOI10.1016/j.physletb.2015.08.013
文章类型Article
英文摘要Using the data sets taken at center-of-mass energies above 4 GeV by the BESIII detector at the BEPCII storage ring, we search for the reaction e(+)e(-) -> gamma(ISR) X(3872) -> gamma(ISR)pi(+)pi(-) J/psi via the Initial State Radiation technique. The production of a resonance with quantum numbers J(PC) = 1(++) such as the X(3872) via single photon e(+)e(-) annihilation is forbidden, but is allowed by a next-to-leading order box diagram. We do not observe a significant signal of X(3872), and therefore give an upper limit for the electronic width times the branching fraction Gamma B-X(3872)(ee)(X(3872) -> pi(+)pi(-) J/psi) < 0.13 eVat the 90% confidence level. This measurement improves upon existing limits by a factor of 46. Using the same final state, we also measure the electronic width of the psi(3686) to be Gamma(psi)(ee)(3686) ee = 2213 +/- 18(stat) +/- 99(sys) eV. (C) 2015 The Authors. Published by Elsevier B.V.
类目[WOS]Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
收录类别SCI ; CA
WOS记录号WOS:000361562900058
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被引频次:3[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/311005/228869
专题中国科学院高能物理研究所_实验物理中心_期刊论文
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BESIII Collaboration. An improved limit for ΓeeΓee of X(3872)X(3872) and ΓeeΓee measurement of ψ(3686)[J]. PHYSICS LETTERS B,2015,749:414-420.
APA BESIII Collaboration.(2015).An improved limit for ΓeeΓee of X(3872)X(3872) and ΓeeΓee measurement of ψ(3686).PHYSICS LETTERS B,749,414-420.
MLA BESIII Collaboration."An improved limit for ΓeeΓee of X(3872)X(3872) and ΓeeΓee measurement of ψ(3686)".PHYSICS LETTERS B 749(2015):414-420.
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