Unitarity cuts and reduction to master integrals in d dimensions for one-loop amplitudes
High Energy Physics - Phenomenology
2010-10-27 v2 High Energy Physics - Theory
Abstract
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.
Cite
@article{arxiv.hep-ph/0612277,
title = {Unitarity cuts and reduction to master integrals in d dimensions for one-loop amplitudes},
author = {Charalampos Anastasiou and Ruth Britto and Bo Feng and Zoltan Kunszt and Pierpaolo Mastrolia},
journal= {arXiv preprint arXiv:hep-ph/0612277},
year = {2010}
}
Comments
38 Pages. v2: reference added, typos fixed