Wolfram Library Archive

Courseware Demos MathSource Technical Notes
All Collections Articles Books Conference Proceedings

FeynmanParameter and Trace--Programs for Expressing Feynman Amplitudes as Integrals over Feynman Parameters

Todd West
Organization: Theory Group, Department of Physics, University of Texas
Journal / Anthology

Computer Physics Communications
Year: 1993
Volume: 77
Page range: 286-298

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 gamma5's.

*Science > Physics > Quantum Physics