Heavy-to-heavy quark decays at NNLO
High Energy Physics - Phenomenology
2008-12-30 v1
Abstract
Details of a recent calculation of O(alpha_s^2) corrections to the decay b -> c,l,nu_l, taking into account the c-quark mass, are described. Construction of the expansion in the mass ratio m_c/m_b as well as the evaluation of new four-loop master integrals are presented. The same techniques are applicable to the muon decay, mu -> e,nu_mu,anti-nu_e. Analytical results are presented, for the physical cases as well as for a model with purely-vector couplings.
Cite
@article{arxiv.0808.3509,
title = {Heavy-to-heavy quark decays at NNLO},
author = {Alexey Pak and Andrzej Czarnecki},
journal= {arXiv preprint arXiv:0808.3509},
year = {2008}
}
Comments
11 pages