Helicity Amplitude Analysis of e+e-→ψ(2S) →γχcJ→γΛ-Λ→γ pπ--pπ+
LIAO Guang-Rui1,2, PING Rong-Gang1, YANG Yong-Xu2
1Institute of High Energy Physics, Chinese Academy of Sciences, PO BOX 918(1), Beijing 1000492Department of Physics, Guangxi Normal University, Guilin 541004
Helicity Amplitude Analysis of e+e-→ψ(2S) →γχcJ→γΛ-Λ→γ pπ--pπ+
LIAO Guang-Rui1,2, PING Rong-Gang1, YANG Yong-Xu2
1Institute of High Energy Physics, Chinese Academy of Sciences, PO BOX 918(1), Beijing 1000492Department of Physics, Guangxi Normal University, Guilin 541004
摘要An analysis of the helicity amplitude is performed on the process e+e-→ψ(2S) →γχcJ→γΛ-Λ→γ pπ--pπ+. 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.
Abstract：An analysis of the helicity amplitude is performed on the process e+e-→ψ(2S) →γχcJ→γΛ-Λ→γ pπ--pπ+. 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.
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2009, Vol. 26 
