对过程e~＋e~－→J／ψ→γ＋X（J^（PC），X→BB（重子，反重子）的角分布和共振态X的自旋－宇称分析

Angular Distributions for the Process e￣+e￣-→J/ψ→γ+X(J￣(pc)),X→ BB and Spin-Parity Analysis of the Resonance X

用螺旋度角分布方法对过程ｅ＋ｅ－～Ｊ／ψ→γ＋Ｘ（ＪＰＣ）→ＢＢ（重子，反重子）进行了分析，得到了Ｘ具有不同自旋─—宇称时角分布及投影角分布的形式，从而可以通过对实验数据的分析来确定共振态Ｘ的自旋性质．

Using the helicity angular distribution method we analyse the process ￣e+e￣-→J/ψ→γ+X(J￣(pc)), X→B. The angular and the projection angular distribution formulas for different spin-parity of the resonance X are obtained. With these formulas, we determine the spin of the resonance X through analysing experimental data.