On the Cuts of Scattering Amplitudes
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
The use of complex analysis for computing one-loop scattering amplitudes is naturally induced by generalised unitarity-cut conditions, fulfilled by complex values of the loop variable. We report on two techniques: the cut-integration with spinor-variables as contour integrals of rational functions; and the use of the Discrete Fourier Transform to optimize the reduction of tensor-integrals to master scalar integrals.
Keywords
Cite
@article{arxiv.0807.3493,
title = {On the Cuts of Scattering Amplitudes},
author = {Pierpaolo Mastrolia},
journal= {arXiv preprint arXiv:0807.3493},
year = {2008}
}
Comments
To appear in the proceedings of 9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory, Sondershausen, Germany, 20-25 Apr 2008