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 non-perturbative parameters...

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Bibliographic Details
Published inPhysics letters. B Vol. 763; pp. 60 - 65
Main Authors Gambino, Paolo, Healey, Kristopher J., Turczyk, Sascha
Format Journal Article
LanguageEnglish
Published Elsevier B.V 10.12.2016
Elsevier
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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 non-perturbative parameters of the heavy quark expansion including for the first time the O(1/mb4,5) 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.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2016.10.023