A novel method to test particle ordering and final state alignment in helicity formalism
High Energy Physics - Experiment
2021-07-07 v1
Abstract
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.
Cite
@article{arxiv.2012.03699,
title = {A novel method to test particle ordering and final state alignment in helicity formalism},
author = {Mengzhen Wang and Yi Jiang and Yinrui Liu and Wenbin Qian and Xiaorui Lyu and Liming Zhang},
journal= {arXiv preprint arXiv:2012.03699},
year = {2021}
}
Comments
16 pages, 4 figures