New approach for amplitudes with multiple fermion lines

作     者：Feng Zhang Bin Gong Jian-Xiong Wang 张丰;Bin Gong;王建雄

作者机构：Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100049China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2022年第46卷第8期

页      面：63-71页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China (12135013,11975242) supported in part by National Key Research and Development Program of China (2020YFA0406400) 

主　　题：multi-particle process scattering amplitude fermion line tree level 

摘      要：A new approach for tree-level amplitudes with multiple fermion lines is *** primarily focuses on the simplification of fermion *** calculating two vectors recursively without any matrix multiplications,the result of a fermion line is reduced to a very compact form depending only on the two *** with other packages are presented,and the results show that our package FDC provides a very good performance in the processes of multiple fermion lines with this new approach and some other improvements.A further comparison with WHIZARD shows that this new approach has a competitive efficiency in computing pure amplitude squares without phase space integration.