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Determination of the branching fraction for B -> X(c)l nu decays and of vertical bar V-cb vertical bar from hadronic-mass and lepton-energy moments

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, JM; Hicheur, A; Karyotakis, Y; ... BaBar Collaboration; + view all (2004) Determination of the branching fraction for B -> X(c)l nu decays and of vertical bar V-cb vertical bar from hadronic-mass and lepton-energy moments. PHYS REV LETT , 93 (1) , Article 011803. 10.1103/PhysRevLett.92.011803. Green open access

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Abstract

We determine the inclusive B-->X(c)lnu branching fraction, B-clnu, the Cabibbo-Kobayashi-Maskawa matrix element \V-cb\, 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/m(b)(3), we extract B-cenu=(10.61+/-0.16(exp)+/-0.06(HQE))% and \V-cb\=(41.4+/-0.4(exp)+/-0.4(HQE)+/-0.6(th))x10(-3). The stated errors refer to the experimental, HQE, and additional theoretical uncertainties.

Type: Article
Title: Determination of the branching fraction for B -> X(c)l nu decays and of vertical bar V-cb vertical bar from hadronic-mass and lepton-energy moments
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.92.011803
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.92.011803
Language: English
Additional information: The American Physical Society
Keywords: SEMILEPTONIC-B, MESON DECAYS, QCD, DISTRIBUTIONS, EXPANSION, BEAUTY
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1303663
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