Unitarity methods for Mellin moments of Drell-Yan cross sections
High Energy Physics - Phenomenology
2016-06-22 v1
Abstract
We develop a method for computing Mellin moments of single inclusive cross sections such as Drell-Yan production directly from forward scattering diagrams, by invoking unitarity in the form of cutting equations. We provide a diagram-independent prescription for eliminating contributions from unwanted cuts at the level of an expansion in the reciprocal omega=1/z variable. The modified sum over powers of omega produces the result from physical cuts only, with the nth coefficient precisely equal to the nth Mellin moment of the cross section. We demonstrate and validate our method for representative one- and two-loop diagrams.
Keywords
Cite
@article{arxiv.1603.05252,
title = {Unitarity methods for Mellin moments of Drell-Yan cross sections},
author = {Domenico Bonocore and Eric Laenen and Robbert Rietkerk},
journal= {arXiv preprint arXiv:1603.05252},
year = {2016}
}
Comments
37 pages with 13 figures