Journal
COMPUTER PHYSICS COMMUNICATIONS
Volume 143, Issue 1, Pages 54-68Publisher
ELSEVIER
DOI: 10.1016/S0010-4655(01)00436-2
Keywords
supersymmetry; Feynman diagrams; perturbative calculations
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We describe the implementation of the MSSM in the diagram generator FeynArts and the calculational tool FormCalc. This extension allows to perform loop calculations of MSSM processes almost fully automatically. The actual implementation has two aspects: The MSSM Feynman rules are specified in a new model File for FeynArts. The computation or the parameters in the MSSM Lagrangian from the input parameters is realized as a Fortran subroutine in the framework of FormCalc. The model file does not depend on the latter, however, and can be used even if one does not want to continue the calculation with FeynCalc. The Feynman rules have been entered in a very generic way to allow, e.g., scenarios with complex parameters, and have been tested extensively by reproducing known results for several non-trivial scattering processes. (C) 2002 Elsevier Science B.V. All rights reserved.
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