| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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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 |
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| Cite this article: |
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LIAO Guang-Rui, PING Rong-Gang, YANG Yong-Xu 2009 Chin. Phys. Lett. 26 051101 |
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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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| Keywords:
11.80.Cr
13.20.Gd
14.20.Jn
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Received: 20 February 2009
Published: 23 April 2009
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