Numerical calculation of helicity amplitudes for processes involving massive fermions
Description
Abstract A method for numerical calculation of Feynman amplitudes is developed. The method is applicable to processes involving massive fermions. Moreover, complete tree level amplitudes for the process e^- e^+ →μ^- μ^+ λ are presented in the framework of the proposed method. Title of program: CHANEL Catalogue Id: ABLT_v1_0 Nature of problem In high energy physics, it is important to evaluate higher order contributions. However, calculations of higher order corrections are quite complicated in the framework of the standard method based on squaring the amplitudes and summing over spin states. More efficient ways to calculate cross sections for complicated sets of Feynman diagrams are desired. Versions of this program held in the CPC repository in Mendeley Data ABLT_v1_0; CHANEL; 10.1016/0010-4655(90)90142-N ABLT_v2_0; CHANEL VERSION 2; 10.1016/0010-4655(91)90058-S This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)