Theoretical Uncertainties in Gamma_sl(b->u)
High Energy Physics - Phenomenology
2014-11-17 v3
Abstract
I review the existing theoretical uncertainties in relating the semileptonic decay width in b->u transitions to the underlying Kobayashi-Maskawa mixing element |V_ub|. The theoretical error bars are only a few percent in |V_ub|, with uncertainties from the impact of the nonperturbative effects nearly negligible.
Keywords
Cite
@article{arxiv.hep-ph/9905520,
title = {Theoretical Uncertainties in Gamma_sl(b->u)},
author = {Nikolai Uraltsev},
journal= {arXiv preprint arXiv:hep-ph/9905520},
year = {2014}
}
Comments
12 pages, LaTeX; discussion of 1/m_b^3 effects is expanded. Contribution to Workshop on the Derivation of |V_cb| and |V_ub|: Experimental Status and Theory Uncertainties, CERN, May 28 - June 2, 1999