Two-loop QCD correction to differential semi-leptonic b --> u decays in the shape-function region
High Energy Physics - Phenomenology
2014-11-18 v2
Abstract
We calculate the two-loop QCD correction to the form factors of on-shell b-quark decay to an energetic massless quark, which constitutes the last missing piece required for an O(alpha_s^2) determination of |V_ub| from inclusive semi-leptonic \bar B --> X_u l nu decays in the shape-function region.
Cite
@article{arxiv.0810.1230,
title = {Two-loop QCD correction to differential semi-leptonic b --> u decays in the shape-function region},
author = {M. Beneke and T. Huber and Xin-Qiang Li},
journal= {arXiv preprint arXiv:0810.1230},
year = {2014}
}
Comments
24 pages, 4 figures. Properly MSbar-renormalized coefficient functions introduced. Matches published version