Automation of one-loop QCD corrections
Abstract
We present the complete automation of the computation of one-loop QCD corrections, including UV renormalization, to an arbitrary scattering process in the Standard Model. This is achieved by embedding the OPP integrand reduction technique, as implemented in CutTools, into the MadGraph framework. By interfacing the tool so constructed, which we dub MadLoop, with MadFKS, the fully automatic computation of any infrared-safe observable at the next-to-leading order in QCD is attained. We demonstrate the flexibility and the reach of our method by calculating the production rates for a variety of processes at the 7 TeV LHC.
Cite
@article{arxiv.1103.0621,
title = {Automation of one-loop QCD corrections},
author = {Valentin Hirschi and Rikkert Frederix and Stefano Frixione and Maria Vittoria Garzelli and Fabio Maltoni and Roberto Pittau},
journal= {arXiv preprint arXiv:1103.0621},
year = {2015}
}
Comments
64 pages, 12 figures. Corrected the value of m_Z in table 1. In table 2, corrected the values of cross sections in a.4 and a.5 (previously computed with mu=mtop/2 rather than mu=mtop/4). In table 2, corrected the values of NLO cross sections in b.3, b.6, c.3, and e.7 (the symmetry factor for a few virtual channels was incorrect). In sect. A.4.3, the labeling of the four-momenta was incorrect