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arXiv · 1606.06174

Taming the higher power corrections in semileptonic B decays

Paolo Gambino·Kristopher J. Healey·Sascha Turczyk
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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.

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Paolo Gambino, Kristopher J. Healey, Sascha Turczyk. 2016-06-20. Taming the higher power corrections in semileptonic B decays. https://doi.org/10.1016/j.physletb.2016.10.023

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