On the Rational Terms of the one-loop amplitudes
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
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.
Cite
@article{arxiv.0802.1876,
title = {On the Rational Terms of the one-loop amplitudes},
author = {Giovanni Ossola and Costas G. Papadopoulos and Roberto Pittau},
journal= {arXiv preprint arXiv:0802.1876},
year = {2008}
}
Comments
14 pages, 3 figures, uses axodraw.sty