Measurement and interpretation of moments in inclusive semileptonic decays B{yields}X{sub c}l{sup -{nu}}

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.032003· OSTI ID:21409145

Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Tico, J Garra; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Bari, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We present results for the moments of observed spectra in inclusive semileptonic B-meson decays to charm hadrons B{yields}X{sub c}l{sup -{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 232x10{sup 6} {Upsilon}(4S){yields}BB 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(B{yields}X{sub c}e{sup -{nu}}) for minimum electron momenta between 0.6 and 1.5 GeV/c based on a sample of 51x10{sup 6} {Upsilon}(4S){yields}BB 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(B{yields}X{sub c}l{sup -{nu}})=(10.64{+-}0.17{+-}0.06)% and |V{sub cb}|=(42.05{+-}0.45{+-}0.70)x10{sup -3}.

• OSTI ID: 21409145
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.032003; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B MESONS
B QUARKS
C QUARKS
ELECTRONS
ENERGY SPECTRA
EXPANSION
EXTRACTION
GEV RANGE
KOBAYASHI-MASKAWA MATRIX
MASS
MUONS
QUANTUM CHROMODYNAMICS
SEMILEPTONIC DECAY
STANFORD LINEAR ACCELERATOR CENTER
T QUARKS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
HADRONS
LEPTONS
MATRICES
MESONS
NATIONAL ORGANIZATIONS
PARTICLE DECAY
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARKS
SEPARATION PROCESSES
SPECTRA
TOP PARTICLES
US DOE
US ERDA
US ORGANIZATIONS
WEAK PARTICLE DECAY