Measurement and interpretation of moments in inclusive semileptonic decays anti-B ---> X(c) l- anti-nu
Collaboration
28 pages
Published in:
- Phys.Rev.D 81 (2010) 032003
e-Print:
- 0908.0415 [hep-ex]
PDG: -QUARK MASS
Report number:
- SLAC-PUB-13735,
- BABAR-PUB-09-004
Experiments:
View in:
Citations per year
Abstract: (arXiv)
We present results for the moments of observed spectra in inclusive semileptonic B-meson decays to charm hadrons Bbar --> X_c l- nubar. 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 232x10^{6} Y(4S) --> B Bbar events, collected with the BABAR detector at the PEP-II asymmetric-energy B-meson factory at SLAC. We also present a re-evaluation of the moments of electron-energy spectra and partial decay fractions BR(Bbar --> X_c e- nubar for minimum electron momenta between 0.6 and 1.5 GeV/c based on a sample of 51x10^{6} Y(4S) --> B Bbar events. The measurements are used for the extraction of the total decay fraction, the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |V_cb|, the quark masses m_b and m_c, and four heavy-quark QCD parameters in the framework of a Heavy Quark Expansion (HQE). We find BR(Bbar --> X_c l- nubar) = (10.64 +/- 0.17 +/- 0.06)% and |V_cb| = (42.05 +/- 0.45 +/- 0.70) x 10^{-3}.Note:
- submitted to Phys. Rev. D
- 12.15.Ff
- 13.30.Ce
- 13.25.Hw
- 12.15.Hh
- electron positron: annihilation
- B: pair production
- B: semileptonic decay
- electron: energy spectrum
- muon: energy spectrum
- hadron: mass spectrum
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