Measurement and Interpretation of Moments in Inclusive Semileptonic Decays B-bar to X_c ell^-
We present results for the moments of observed spectra in inclusive semileptonic B-meson decays to charm hadrons {bar B} {yields} X{sub c} {ell}{sup -}{bar {nu}}. 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 x 10{sup 6} {Gamma}(4S) {yields} B{bar B} 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({bar B} {yields} X{sub c}e{sup -}{bar {nu}}) for minimum electron momenta between 0.6 and 1.5 GeV/c based on a sample of 51 x 10{sup 6} {Gamma}(4S) {yields} B{bar B} events. The measurements are used for the extraction of the total decay fraction, the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |V{sub cb}|, the quark masses m{sub b} and m{sub c}, and four heavy-quark QCD parameters in the framework of a Heavy-Quark Expansion (HQE). We find B({bar B} {yields} X{sub c}{ell}{sup -}{bar {nu}}) = (10.64 {+-} 0.17 {+-} 0.06)% and |V{sub cb}| = (42.05 {+-} 0.45 {+-} 0.70) x 10{sup -3}.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1018229
- Report Number(s):
- SLAC-PUB-13735; arXiv:0908.0415; TRN: US1103321
- Journal Information:
- Phys.Rev.D81:032003,2010, Journal Name: Phys.Rev.D81:032003,2010
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the First and Second Moments of the Hadronic Mass Distribution in Semileptonic B Decays
Measurement and Interpretation of Moments of the Combined Hadronic Mass and Energy Spectrum in Inclusive Semileptonic B-Meson Decays