Taming the higher power corrections in semileptonic B decays

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 o...

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Bibliographic Details
Published inarXiv.org
Main Authors Gambino, Paolo, Healey, Kristopher J, Turczyk, Sascha
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 13.10.2016
Subjects
Decay
Physics - High Energy Physics - Experiment
Physics - High Energy Physics - Phenomenology
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Summary: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.
Bibliography:MITP/16-056
ISSN:2331-8422
DOI:10.48550/arxiv.1606.06174