Taming the higher power corrections in semileptonic B decays
High Energy Physics - Phenomenology
2016-10-19 v2 High Energy Physics - Experiment
Abstract
We study the effect of dimension 7 and 8 operators on inclusive semileptonic B decays and the extraction of |Vcb|. Using moments of semileptonic B decay spectra and information based on the Lowest-Lying State saturation Approximation (LLSA) we perform a global fit of the nonperturbative parameters of the heavy quark expansion including for the first time the O(1/mb^{4,5}) contributions. Higher power corrections appear to have a very small effect on the extraction of |Vcb|, independently of the weight we attribute to the LLSA.
Keywords
Cite
@article{arxiv.1606.06174,
title = {Taming the higher power corrections in semileptonic B decays},
author = {Paolo Gambino and Kristopher J. Healey and Sascha Turczyk},
journal= {arXiv preprint arXiv:1606.06174},
year = {2016}
}
Comments
6 pages, 3 figures, small changes to match accepted publication in PLB