论文标题
测试粒子排序和最终状态对齐方式形式上的新方法
A novel method to test particle ordering and final state alignment in helicity formalism
论文作者
论文摘要
在本文中，当使用螺旋形式形式构建多体衰变的部分波振幅时，重要性表明了适当的参考粒子选择衰减角度定义的选择。在Helicity形式主义的标准用例中，通常会忽略此问题。提出了一种新技术来确定正确的粒子排序，也可以用作一种通用方法，以计算用于不同衰减链之间最终状态比对的旋转算子。还进行了数值验证，以支持本文提出的参数和新技术。
In this article, the importance is demonstrated of a proper choice of reference particles for decay angle definitions, when constructing partial-wave amplitude of multi-body decays using helicity formalism. This issue is often ignored in the standard use case of the helicity formalism. A new technique is proposed to determine the correct particle ordering, and can also be used as a generalized method to calculate the rotation operators used for the final-state alignment between different decay chains. Numerical validations are also performed to support the arguments and new technique proposed in this article.
