Modern Feynman Diagrammatic One-Loop Calculations
High Energy Physics - Phenomenology
2023-01-26 v1
Abstract
In this talk we present techniques for calculating one-loop amplitudes for multi-leg processes using Feynman diagrammatic methods in a semi-algebraic context. Our approach combines the advantages of the different methods allowing for a fast evaluation of the amplitude while monitoring the numerical stability of the calculation. In phase space regions close to singular kinematics we use a method avoiding spurious Gram determinants in the calculation. As an application of our approach we report on the status of the calculation of the amplitude for the process .
Cite
@article{arxiv.1011.6632,
title = {Modern Feynman Diagrammatic One-Loop Calculations},
author = {Thomas Reiter and Gavin Cullen and Nicolas Greiner and Alberto Guffanti and Jean-Philippe Guillet and Gudrun Heinrich and Stefan Karg and Nikolas Kauer and Tobias Kleinschmidt and Maciej Koch-Janusz and Gionata Luisoni and Pierpaolo Mastrolia and Giovanni Ossola and Eric Pilon and Mark Rodgers and Francesco Tramontano and Ioan Wigmore},
journal= {arXiv preprint arXiv:1011.6632},
year = {2023}
}
Comments
10 pages, 2 figures; contribution to the proceedings of the CPP2010 Workshop, 23-25 Sep. 2010, KEK, Tsukuba, Japan