Colourful FKS subtraction
High Energy Physics - Phenomenology
2021-06-25 v2
Abstract
I formulate in a colour-friendly way the FKS method for the computation of QCD cross sections at the next-to-leading order accuracy. This is achieved through the definition of subtraction terms for squared matrix elements, constructed with single colour-dressed or pairs of colour-ordered amplitudes. The latter approach relies on the use of colour flows, is exact to all orders in , and is thus particularly suited to being organized as a systematic expansion in 1/N.
Cite
@article{arxiv.1106.0155,
title = {Colourful FKS subtraction},
author = {Stefano Frixione},
journal= {arXiv preprint arXiv:1106.0155},
year = {2021}
}
Comments
56 pages. This version is identical to that published in JHEP, except for a couple of minor corrections in app. C