| Helicity Amplitude Analysis of ηc Decays into Hyperon-Antihyperon Pairst |
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| 作者单位： | [1]Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918（1）, Beijing 100049, China [2]College of Physics and Electronic Engineering, Guangxi Normal University, Guilin 541004, China [3]Liuzhou High School, Liuzhou 545006, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China, Youth Innovation Project of IHEP, and the Innovation Project of Guangxi Graduate Eduction under Grant No. 2007106020702M54 We thank Dr. Shen Cheng-Ping for some helpful comments and suggestions. |
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| 摘 要： | The helicity amplitudes for the processes of e^＋e^- →J/ψ→γηc→γYY（Y： hyperon） are presented, together with the joint angular distributions for ηc decays into ∧∧,∑^0 ∑^0, and 1]-1]＋. The sensitivities to measure the hyperon decay parameters in these decays are evaluated based on the helicity amplitudes. The prospects to test the Bell inequality in experiment using the decay of ηc→∧∧ are discussed.
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| 关 键 词： | 衰变 振幅 螺旋 超子 贝尔不等式 电子商务 衰减参数 角分布 |
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