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Taming the higher power corrections in semileptonic B decays

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arxiv 1606.06174 v2 pith:SF6QZ5US submitted 2016-06-20 hep-ph hep-ex

Paolo Gambino , Kristopher J. Healey , Sascha Turczyk This is my paper · ORCID
classification hep-phhep-ex
keywords semileptoniccorrectionsdecayseffectextractionhigherllsapower
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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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  1. Data determination of HQET parameters in inclusive charm decays

    hep-ph 2025-02 conditional novelty 6.0 of 10

    The first data-driven determination of the HQET parameters mu_pi^2, mu_G^2, rho_D^3 and rho_LS^3 for D0, D+ and Ds mesons is obtained from inclusive semileptonic decay widths and electron energy moments.

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