Exact O(g^2 alpha_s) top decay width from general massive two-loop integrals
High Energy Physics - Phenomenology
2016-12-21 v1
Abstract
We calculate the b-dependent self-energy of the top quark at O(g^2 \alpha_s) by using a general massive two-loop algorithm proposed in a previous article. From this we derive by unitarity the O(\alpha_s) radiative corrections to the decay width of the top quark, where all effects associated with the quark mass are included without resorting to a mass expansion. Our results agree with the analytical results available for the O(\alpha_s) correction to the top quark width.
Cite
@article{arxiv.hep-ph/0002211,
title = {Exact O(g^2 alpha_s) top decay width from general massive two-loop integrals},
author = {Adrian Ghinculov and York-Peng Yao},
journal= {arXiv preprint arXiv:hep-ph/0002211},
year = {2016}
}