Calculating two- and three-body decays with FeynArts and FormCalc

Details Calculating two- and three-body decays with FeynArts and FormCalc Calculating two- and three-body decays with FeynArts and FormCalc

2002-10-30

arxiv.org/abs/hep-ph/0210426v1

Int.J.Mod.Phys. C14 (2003) 1273-1278

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 1 figure

Scientific paper

10.1142/S012918310300539X

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: h->b\bar{b}, \mu->e\bar{\nu}_e\nu_\mu, and Z->\nu_e\bar{\nu}_e.

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