Unitarity cuts and reduction to master integrals in d dimensions for one-loop amplitudes

Details Unitarity cuts and reduction to master integrals in d dimensions for one-loop amplitudes Unitarity cuts and reduction to master integrals in d dimensions for one-loop amplitudes

2006-12-21

arxiv.org/abs/hep-ph/0612277v2

JHEP 0703:111,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

38 Pages. v2: reference added, typos fixed

Scientific paper

10.1088/1126-6708/2007/03/111

We present an alternative reduction to master integrals for one-loop amplitudes using a unitarity cut method in arbitrary dimensions. We carry out the reduction in two steps. The first step is a pure four-dimensional cut-integration of tree amplitudes with a mass parameter, and the second step is applying dimensional shift identities to master integrals. This reduction is performed at the integrand level, so that coefficients can be read out algebraically.

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