Measurement and interpretation of moments in inclusive semileptonic decays B[over-bar] -->X[subscript c]ℓ-nu[over-bar]
Name
Aubert-2010-Measurement and interpretation of moments in inclusive semileptonic decays.pdf
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Author(s)
Dujmic, Denis
Henderson, Shawn Wesley
Sciolla, Gabriella
Yamamoto, R. K.
Zhao, M.
Cowan, Ray F
Fisher, Peter H
Spitznagel, Michael A
Alternative Title
Measurement and interpretation of moments in inclusive semileptonic decays B̅ →Xcℓ-ν̅
Date Issued
February 2010
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
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].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.032003
