Automated One-Loop Calculations with GoSam
Abstract
We present the program package GoSam which is designed for the automated calculation of one-loop amplitudes for multi-particle processes in renormalisable quantum field theories. The amplitudes, which are generated in terms of Feynman diagrams, can be reduced using either D-dimensional integrand-level decomposition or tensor reduction. GoSam can be used to calculate one-loop QCD and/or electroweak corrections to Standard Model processes and offers the flexibility to link model files for theories Beyond the Standard Model. A standard interface to programs calculating real radiation is also implemented. We demonstrate the flexibility of the program by presenting examples of processes with up to six external legs attached to the loop.
Keywords
Cite
@article{arxiv.1111.2034,
title = {Automated One-Loop Calculations with GoSam},
author = {Gavin Cullen and Nicolas Greiner and Gudrun Heinrich and Gionata Luisoni and Pierpaolo Mastrolia and Giovanni Ossola and Thomas Reiter and Francesco Tramontano},
journal= {arXiv preprint arXiv:1111.2034},
year = {2012}
}
Comments
32 pages, replaced by published version