Evidence for the Direct Two-Photon Transition from psi(3686) to J/psi
BESIII Collaboration
刊名PHYSICAL REVIEW LETTERS
2012
卷号109期号:17
学科分类Physics
DOI10.1103/PhysRevLett.109.172002
通讯作者Ablikim, M (reprint author), Inst High Energy Phys, Beijing 100049, Peoples R China.
英文摘要The two-photon transition psi(3686) -> gamma gamma J/psi is studied in a sample of 1.06 x 10(8) psi(3686) decays collected by the BESIII detector. The branching fraction is measured to be (3.1 +/- 0.6(stat)(-1.0)(+0.8)(syst)) x 10(-4) using J/psi -> e(+)e(-) and J/psi -> mu(+)mu(-) decays, and its upper limit is estimated to be 4.5 x 10(-4) at the 90% confidence level. This work represents the first measurement of a two-photon transition among charmonium states. The orientation of the psi(3686) decay plane and the J/psi polarization in this decay are also studied. In addition, the product branching fractions of sequential E1 transitions psi(3686) -> gamma chi(cJ) and chi(cJ) -> gamma J/psi (J = 0, 1, 2) are reported.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
语种英语
WOS记录号WOS:000310201000005
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被引频次:7[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/311005/213363
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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BESIII Collaboration. Evidence for the Direct Two-Photon Transition from psi(3686) to J/psi[J]. PHYSICAL REVIEW LETTERS,2012,109(17).
APA BESIII Collaboration.(2012).Evidence for the Direct Two-Photon Transition from psi(3686) to J/psi.PHYSICAL REVIEW LETTERS,109(17).
MLA BESIII Collaboration."Evidence for the Direct Two-Photon Transition from psi(3686) to J/psi".PHYSICAL REVIEW LETTERS 109.17(2012).
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