Inclusive semileptonic B decays from QCD with NLO accuracy for power suppressed terms

Alexei A. Pivovarov; Denis Rosenthal; Thomas Mannel

Inclusive semileptonic B decays from QCD with NLO accuracy for power suppressed terms

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arxiv 1405.5072 v1 pith:2ZZBAMAX submitted 2014-05-20 hep-ph

Inclusive semileptonic B decays from QCD with NLO accuracy for power suppressed terms

Thomas Mannel , Alexei A. Pivovarov , Denis Rosenthal This is my paper

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keywords decaysheavyinclusivemesonspowerquarksemileptonicsuppressed

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We present the results of a calculation of the perturbative QCD corrections for the semileptonic inclusive width of a heavy flavored meson. Within the Heavy Quark Expansion we analytically compute the QCD correction to the coefficient of power suppressed contribution of the chromo-magnetic operator in the limit of vanishing mass of the final state quark. The important phenomenological applications are decays of bottom mesons, and to the less extend, charmed mesons.

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NNLO-QCD corrections to the free b-quark decay and NLO corrections to dimension-five operators reduce uncertainties in HQE predictions for b-baryon lifetimes, yielding excellent agreement with experiment.