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Determination of the Branching Fraction for B→Xcℓν Decays and of |Vcb| from Hadronic-Mass and Lepton-Energy Moments

Aubert, B. et al. (2004) Determination of the Branching Fraction for B→Xcℓν Decays and of |Vcb| from Hadronic-Mass and Lepton-Energy Moments. Physical Review Letters, 93 (1). 011803. ISSN 0031-9007

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Abstract

We determine the inclusive B→Xcℓν branching fraction, Bcℓν, the Cabibbo-Kobayashi-Maskawa matrix element |Vcb|, and other heavy-quark parameters from a simultaneous fit to moments of the hadronic-mass and lepton-energy distributions in semileptonic B-meson decays, measured as a function of the lower limit on the lepton energy, using data recorded with the BABAR detector. Using heavy-quark expansions (HQEs) to order 1/mb3, we extract Bceν=(10.61±0.16exp±0.06HQE)% and |Vcb|=(41.4±0.4exp±0.4HQE±0.6th)×10-3. The stated errors refer to the experimental, HQE, and additional theoretical uncertainties.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Depositing User: Sharon Beastall
Date Deposited: 06 Apr 2011 12:51
Last Modified: 06 Apr 2011 12:51
URI: http://eprints.hud.ac.uk/id/eprint/10045

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