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CALCULATING TWO- AND THREE-BODY DECAYS WITH FeynArts AND FormCalc

MICHAEL KLASEN

Laboratoire de Physique Subatomique et de Cosmologie, 53 Avenue des Martyrs, F-38026 Grenoble, France

https://doi.org/10.1142/S012918310300539XCited by:5 (Source: Crossref)

Abstract

The Feynman diagram generator FeynArts and the computer algebra program FormCalc allow for an automatic computation of 2→2 and 2→3 scattering processes in High Energy Physics. We have extended this package by four new kinematical routines and adapted one existing routine in order to accomodate also two- and three-body decays of massive particles. This makes it possible to compute automatically two- and three-body particle decay widths and decay energy distributions as well as resonant particle production within the Standard Model and the Minimal Supersymmetric Standard Model at the tree- and loop-level. The use of the program is illustrated with three standard examples: , , and .

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