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Measurement and interpretation of moments in inclusive semileptonic decays B[over-bar] -->X[subscript c]ℓ-nu[over-bar]

Author(s)
Dujmic, Denis; Henderson, Shawn Wesley; Sciolla, Gabriella; Yamamoto, R. K.; Zhao, M.; Cowan, Ray F; Fisher, Peter H; Spitznagel, Michael A; ... Show more Show less
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Alternative title
Measurement and interpretation of moments in inclusive semileptonic decays B̅ →Xcℓ-ν̅
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We present results for the moments of observed spectra in inclusive semileptonic B-meson decays to charm hadrons B̅ -->X[subscript c]ℓ-nu[over-bar]. Moments of the hadronic-mass and the combined mass-and-energy spectra for different minimum electron or muon momenta between 0.8 and 1.9  GeV/c are obtained from a sample of 232×10[superscript 6] Υ(4S)-->BB̅ events, collected with the BABAR detector at the PEP-II asymmetric-energy B-meson factory at SLAC. We also present a reevaluation of the moments of electron-energy spectra and partial decay fractions B(B̅ -->X[subscript c]e-ν̅ ) for minimum electron momenta between 0.6 and 1.5  GeV/c based on a sample of 51×10[superscript 6] Υ(4S)-->BB̅ events. The measurements are used for the extraction of the total decay fraction, the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |Vcb|, the quark masses m[subscript b] and m[subscript c], and four heavy-quark QCD parameters in the framework of a Heavy-Quark Expansion (HQE). We find B(B̅ -->X[subscript c]ℓ-ν̅ )=(10.64±0.17±0.06)% and |V[subscript cb]|=(42.05±0.45±0.70)×10[superscript -3].
Date issued
2010-02
URI
http://hdl.handle.net/1721.1/58835
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aubert, B. et al. “Measurement and interpretation of moments in inclusive semileptonic decays B[over -bar]-->X[subscript c]l- nu [over -bar].” Physical Review D 81.3 (2010): 032003. © 2010 The American Physical Society.
Version: Final published version
ISSN
1550-7998

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