O(alpha_s^2) corrections to b -> c decay at zero recoil
High Energy Physics - Phenomenology
2011-01-25 v1
Abstract
Analytic formulae are presented for the two-loop perturbative QCD corrections to b -> c decay at the zero recoil point, which are required for the extraction of |V_bc| from measurements of exclusive B -> D* l nu decays. The results are in agreement with those of Czarnecki and Melnikov. Some comments on the numerical evaluation of the diagrams involved are made.
Keywords
Cite
@article{arxiv.hep-ph/9712205,
title = {O(alpha_s^2) corrections to b -> c decay at zero recoil},
author = {J. Franzkowski and J. B. Tausk},
journal= {arXiv preprint arXiv:hep-ph/9712205},
year = {2011}
}
Comments
Latex, 12 pages, 13 postscript figures included with epsfig