Feynman Rules for the Rational Part of the QCD 1-loop amplitudes

Details Feynman Rules for the Rational Part of the QCD 1-loop amplitudes Feynman Rules for the Rational Part of the QCD 1-loop amplitudes

2009-03-02

arxiv.org/abs/0903.0356v2

JHEP 0904:072,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 11 figures. Misprints corrected in Appendix A. Version to be published in JHEP

Scientific paper

10.1088/1126-6708/2009/04/072

We compute the complete set of Feynman Rules producing the Rational Terms of kind R_2 needed to perform any QCD 1-loop calculation. We also explicitly check that in order to account for the entire R_2 contribution, even in case of processes with more than four external legs, only up to four-point vertices are needed. Our results are expressed both in the 't Hooft Veltman regularization scheme and in the Four Dimensional Helicity scheme, using explicit color configurations as well as the color connection language.

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