Automatic Calculation of supersymmetric Renormalization Group Equations and Self Energies

TL;DR

SARAH is a Mathematica package that automates the calculation of renormalization group equations, self energies, and model files for supersymmetric theories, streamlining model analysis and implementation.

Contribution

The paper introduces the second version of SARAH, which automates derivation of RGEs, self energies, and model files for a wide class of N=1 SUSY models, including two-loop calculations.

Findings

Automates RGE derivation at one- and two-loop levels.

Calculates one-loop self energies and tadpole corrections.

Supports arbitrary N=1 SUSY models with complex gauge sectors.

Abstract

SARAH is a Mathematica package for studying supersymmetric models. It calculates for a given model the masses, tadpole equations and all vertices at tree-level. Those information can be used by \SARAH to write model files for CalcHep/CompHep or FeynArts/FormCalc. In addition, the second version of SARAH can derive the renormalization group equations for the gauge couplings, parameters of the superpotential and soft-breaking parameters at one and two-loop level. Furthermore, it calculates the one-loop self energies and the one-loop corrections to the tadpoles. SARAH can handle all N=1 SUSY models whose gauge sector is a direct product of SU(N) and U(1) gauge groups. The particle content of the model can be an arbitrary number of chiral superfields transforming as any irreducible representation with respect to the gauge groups. To implement a new model, the user has just to define the gauge sector, the particle, the superpotential and the field rotations to mass eigenstates.