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Manuscript Title: Automatic calculation of supersymmetric Renormalization Group Equations and Loop Corrections
Authors: Florian Staub
Program title: SARAH
Catalogue identifier: AEIB_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 182(2011)808
Programming language: Mathematica.
Computer: All systems that Mathematica is available for.
Operating system: All systems that Mathematica is available for.
Keywords: Supersymmetry, Model buildling, Lagrangian, Renormalization Group Equations, Mass matrices, Feynman rules, One loop calculations.
Classification: 11.1, 11.6.

Nature of problem:
A supersymmetric model is usually characterized by the particle content, the gauge sector and the superpotenial. It is a time consuming process to obtain all necessary information for phenomenological studies from these basic ingredients.

Solution method:
SARAH calculates the complete Lagrangian for a given model whose gauge sector can be any direct product of SU(N) gauge groups. The chiral superfields can transform as any, irreducible representation with respect to these gauge groups and it is possible to handle an arbitrary number of symmetry breakings or particle rotations. Also the gauge fixing terms can be specified. Using this information, SARAH derives the mass matrices and Feynman rules at tree-level and generates model files for CalcHep/CompHep and FeynArts/FormCalc. In addition, it can calculate the renormalization group equations at one- and two-loop level and the one-loop corrections to the one- and two-point functions

Unusual features:
SARAH just needs the superpotential and gauge sector as input and not the complete Lagrangian. Therefore, the complete implementation of new models is done in some minutes.

Running time:
Measured CPU time for the evaluation of the MSSM on a Intel Q8200 with 2.33GHz. Calculating the complete Lagrangian: 12 seconds. Calculating all vertices: 75 seconds. Calculating the one- and two-loop RGEs: 50 seconds. Calculating the one-loop corrections: 7 seconds. Writing a FeynArts file: 1 second. Writing a CalcHep/CompHep file: 6 seconds. Writing the LaTeX output: 1 second.