【摘 要】
：
最近BESⅡ合作组在pp-不变质量谱阈值附近观测到一个增强．利用协变张量方法,给出了ψ辐射衰变道ψ→γpp-,γΛΛ-,γΞΞ-分波分析的理论公式．通过蒙特卡罗模拟,还给出了J／ψ→
【机 构】
：
中国科学院高能物理研究所,中国科学院高能物理研究所,中国高等科技中心,中国高等科技中心 北京 100049 新疆大学物理系 乌鲁木齐 830046,北京 100049 中国科学院研究生院 北京 100
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最近BESⅡ合作组在pp-不变质量谱阈值附近观测到一个增强．利用协变张量方法,给出了ψ辐射衰变道ψ→γpp-,γΛΛ-,γΞΞ-分波分析的理论公式．通过蒙特卡罗模拟,还给出了J／ψ→γPP-中光子和质子的角分布,它们可以作为将来对这些道分波分析的有用参考．
A recent enhancement of the BESII cooperative group around the pp-invariant mass spectral threshold. By using the method of covariant tensor, the theoretical formulas for ψ → γpp-, γΛΛ- and γΞΞ-decoupling analysis of ψ radiation decay are given. The angular distribution of photons and protons in J / ψ → γPP- is also given by Monte Carlo simulations, which can serve as a useful reference for the future analysis of these wavelets.
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