Solving for tadpole coefficients in one-loop amplitudes
High Energy Physics - Theory
2011-01-18 v2 High Energy Physics - Phenomenology
Abstract
One-loop amplitudes may be expanded in a basis of scalar integrals multiplied by rational coefficients. We relate the coefficient of the one-point integral to the coefficients of higher-point integrals, by considering the effects of introducing an additional, unphysical propagator, subject to certain conditions.
Cite
@article{arxiv.0904.2766,
title = {Solving for tadpole coefficients in one-loop amplitudes},
author = {Ruth Britto and Bo Feng},
journal= {arXiv preprint arXiv:0904.2766},
year = {2011}
}
Comments
9 pages. v2: Eq. (28) corrected, typos fixed, minor improvements