We study Feynman rules for the rational part R of the Standard Model
amplitudes at one-loop level in the 't Hooft-Veltman γ5 scheme.
Comparing our results for quantum chromodynamics and electroweak 1-loop
amplitudes with that obtained based on the Kreimer-Korner-Schilcher (KKS)
γ5 scheme, we find the latter result can be recovered when our
γ5 scheme becomes identical (by setting g5s=1 in our expressions)
with the KKS scheme. As an independent check, we also calculate Feynman rules
obtained in the KKS scheme, finding our results in complete agreement with
formulae presented in the literature. Our results, which are studied in two
different γ5 schemes, may be useful for clarifying the γ5
problem in dimensional regularization. They are helpful to eliminate or find
ambiguities arising from different dimensional regularization schemes.Comment: Version published in JHEP, presentation improved, 41 pages, 10
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