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FeynArts model file for MSSM transition counterterms from DREG to DRED

Dominik Stockinger
Philipp Varso
Journal / Anthology

Computer Physics Communications
Year: 2012
Volume: 183
Issue: 2
Page range: 422-430

The FeynArts model file MSSMdreg2dred implements MSSM transition counterterms which can convert one-loop Green functions from dimensional regularization to dimensional reduction. They correspond to a slight extension of the well-known Martin/Vaughn counterterms, specialized to the MSSM, and can serve also as supersymmetry-restoring counterterms. The paper provides full analytic results for the counterterms and gives one- and two-loop usage examples. The model file can simplify combining MSparton distribution functions with supersymmetric renormalization or avoiding the renormalization of -scalars in dimensional reduction.