On the Rational Terms of the one-loop amplitudes

Details On the Rational Terms of the one-loop amplitudes On the Rational Terms of the one-loop amplitudes

2008-02-13

arxiv.org/abs/0802.1876v1

JHEP0805:004,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 3 figures, uses axodraw.sty

Scientific paper

10.1088/1126-6708/2008/05/004

The various sources of Rational Terms contributing to the one-loop amplitudes are critically discussed. We show that the terms originating from the generic (n-4)-dimensional structure of the numerator of the one-loop amplitude can be derived by using appropriate Feynman rules within a tree-like computation. For the terms that originate from the reduction of the 4-dimensional part of the numerator, we present two different strategies and explicit algorithms to compute them.

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