Helicity Amplitude Analysis of ηc Decays into Hyperon-Antihyperon Pairs

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2009,（6）
• 页码范围: 1091-1094
• 页数: 4页
• 语种: 英文

摘要

The helicity amplitudes for the processes of e+ e-→J/ψ→γη→γYY- (Y: hyperon) are presented, together with the joint angular distributions for η decays into ΛΛ, Σ0Σ0, and Ξ-Ξ+. 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→ΛΛ are discussed.