Helicity Amplitude Analysis of e^＋e^- ψ（2S） → γχcJ→γ∧∧^-→γpπ^-p^-π^＋＊  

作　　者：廖广睿 平荣刚 杨永栩 

机构地区：[1]Institute of High Energy Physics, Chinese Academy of Sciences, PO BOX 918(1), Beijing 100049 [2]Department of Physics, Guangxi Normal University, Guilin 541004

出　　处：《Chinese Physics Letters》2009年第5期41-43,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China, and the Youth Innovation Project of IHEP.

摘　　要：An analysis of the helicity amplitude is performed on the process e^＋e^- ψ（2S） → γχcJ→γ∧∧^-→γpπ^-p^-π^＋. The joint angular distributions for each decay chain are given, and we focus on discussing the E1 contributions to ψ（2S） radiative decays, and the violation of the helicity selection rule in χcJ decays into hyperon pairs, together with the possibility of observing parity violation in successive hyperon decays.An analysis of the helicity amplitude is performed on the process e^＋e^- ψ（2S） → γχcJ→γ∧∧^-→γpπ^-p^-π^＋. The joint angular distributions for each decay chain are given, and we focus on discussing the E1 contributions to ψ（2S） radiative decays, and the violation of the helicity selection rule in χcJ decays into hyperon pairs, together with the possibility of observing parity violation in successive hyperon decays.

分 类 号：O613.62[理学—无机化学] TP393.4[理学—化学]