FeynmanParameter and trace - programs for expressing Feynman amplitudes as integrals over Feynman parameters

Abstract We present two Mathematica programs, FeynmanParameter and trace, that automate the evaluation of Feynman diagrams with loops. FeynmanParameter converts integrals over loop momenta into integrals over Feynman parameters. If the input for FeynmanParameter contains any traces these are first evaluated by the program trace. Both trace and FeynmanParameter can work in an arbitrary number of dimensions, if desired - even if the traces to be evaluated contain γ_5 's. Title of program: FeynmanParameter[] and trace[] Catalogue Id: ACNW_v1_0 Nature of problem Calculation of Feynman diagrams with loops - including the conversion of momentum integrals into integrals over Feynman parameters and the evaluation of any traces - in an arbitrary number of dimensions. Versions of this program held in the CPC repository in Mendeley Data ACNW_v1_0; FeynmanParameter[] and trace[]; 10.1016/0010-4655(93)90011-Z This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)