From Superpotential to Model Files for FeynArts and CalcHep/CompHep

TL;DR

This paper introduces an update to the SARAH Mathematica package that automates the generation of model files for FeynArts and CalcHep/CompHep from supersymmetric models, streamlining the process of particle physics calculations.

Contribution

It provides new functionalities in SARAH to automatically compute all interactions, generate model files for simulation tools, and handle complex model features like CP violation and gauge fixing.

Findings

Automated generation of FeynArts and CalcHep model files from supersymmetric models.

Inclusion of tadpole equations, gauge fixing, and ghost interactions in model files.

Flexible handling of non-supersymmetric limits and violation effects.

Abstract

SARAH is a Mathematica package for building and studying supersymmetric models. It calculates for a given superpotential and gauge sector the full Lagrangian of a model. With the new version of SARAH it is possible to calculate automatically all interactions for the different eigenstates and write model files for FeynArts and CompHep/CalcHep. In addition, the tadpole equations are calculated, gauge fixing terms can be given and ghost interactions are added, particles can be integrated out and non supersymmetric limits of the theory can be chosen. CP and flavor violation can easily be switched on or off.