中文摘要：

用顺序的腐烂过程， p ? 作为一个例子，为推出完整的尖分发的过程被在 helicity 形式主义采用 Jacob 灯芯和杰克逊习惯说明。保证最后的物理结果没有阶段习惯，我们指出在参考框架的不同坐标系统联系尖动量状态的系数不得不在过程适当地被考虑。那些系数是常数的事实建议杰克森习惯在与顺序的腐烂处理这些过程是有利的。

英文摘要：

Using the sequential decay process e ＋ e- → J/ψ→ΛΛ, Λ→ pπ- , Λ→ pπ＋ as an example, the procedure for deducing the full angular distribution is illustrated by adopting both the Jacob-Wick and Jackson conventions in the helicity formalism. To make sure that the final physical result is free of phase conventions, we point out that the coefficients that relate the angular momentum states in different coordinate systems of reference frames have to be taken into account properly in the procedure. The fact that those coefficients are constants suggests that the Jackson convention is favorable in dealing with the processes with sequential decays.