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When using dimensional regularization/reduction the epsilon-dimensionalnumerator of the 1-loop Feynman diagrams gives rise to rational contributions.I list the set of fundamental rules that allow the extraction of such terms atthe integrand level in any theory containing scalars, vectors and fermions,such as the electroweak standard model, QCD and SUSY.

Primary Feynman rules to calculate the epsilon-dimensional integrand of any 1-loop amplitude