Two-loop QCD corrections to semileptonic b decays at an intermediate recoil
High Energy Physics - Phenomenology
2011-01-25 v1
Abstract
We present complete O(alpha_s^2) corrections to the decay b-->c+l+nu at the point where the invariant mass of the leptons sqrt{q^2} equals the c quark mass. We use this result, together with previously obtained corrections at the ends of the q^2 spectrum, to estimate the total width of the semileptonic b-->c decay with O(alpha_s^2) accuracy, essential for the |V_{cb}| determination.
Cite
@article{arxiv.hep-ph/9804215,
title = {Two-loop QCD corrections to semileptonic b decays at an intermediate recoil},
author = {Andrzej Czarnecki and Kirill Melnikov},
journal= {arXiv preprint arXiv:hep-ph/9804215},
year = {2011}
}
Comments
8 pages, revtex