An improved limit for ΓeeΓee of X(3872)X(3872) and ΓeeΓee measurement of ψ(3686)
文献类型：期刊论文
| 作者 | BESIII Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2015 |
| 卷号 | 749页码:414-420 |
| 关键词 | X(3872) psi(3686) Gamma(ee) Charmonium spectroscopy BESIII |
| 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. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields |
| 收录类别 | SCI ; CA |
| WOS记录号 | WOS:000361562900058 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228869]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 推荐引用方式 GB/T 7714 | 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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来源：高能物理研究所
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