Numerical NLO QCD calculations
High Energy Physics - Phenomenology
2010-12-09 v2
Abstract
We present an algorithm for the numerical calculation of one-loop QCD amplitudes. The algorithm consists of subtraction terms, approximating the soft, collinear and ultraviolet divergences of one-loop amplitudes and a method to deform the integration contour for the loop integration into the complex space. The algorithm is formulated at the amplitude level and does not rely on Feynman graphs. Therefore all required ingredients can be calculated efficiently using recurrence relations. The algorithm applies to massless partons as well as to massive partons.
Cite
@article{arxiv.1010.4187,
title = {Numerical NLO QCD calculations},
author = {Sebastian Becker and Christian Reuschle and Stefan Weinzierl},
journal= {arXiv preprint arXiv:1010.4187},
year = {2010}
}
Comments
62 pages, version to be published