Measurement and interpretation of moments in inclusive semileptonic decays B[over-bar] -->X[subscript c]ℓ-nu[over-bar]
Author(s)Cowan, Ray Franklin; Fisher, Peter H.; Dujmic, Denis; Henderson, Shawn Wesley; Sciolla, Gabriella; Spitznagel, M.; Yamamoto, R. K.; Zhao, M.; ... Show more Show less
DownloadAubert-2010-Measurement and interpretation of moments in inclusive semileptonic decays.pdf (901.5Kb)
Measurement and interpretation of moments in inclusive semileptonic decays B̅ →Xcℓ-ν̅
MetadataShow full item record
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].
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review D
American Physical Society
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.
Final published version