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.

Taming the higher power corrections in semileptonic B decays

GAMBINO, Paolo;HEALEY, Kristopher Jason;
2016-01-01

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.
2016
763
60
65
http://www.sciencedirect.com/science/article/pii/S0370269316305949
https://arxiv.org/abs/1606.06174
Gambino, Paolo; Healey, Kristopher J.; Turczyk, Sascha
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1607415
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