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Aubert, B.; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prudent, X.; Tisserand, V.; Zghiche, A.; Garra Tico, J.; Grauges, E.; Lopez, L.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Abrams, G. S.; Battaglia, M.; Brown, D. N.
BABAR Collaboration
arXiv e-print [ PDF ]2008
BABAR Collaboration
arXiv e-print [ PDF ]2008
AbstractAbstract
[en] We present partial branching fractions for inclusive charmless semileptonic B decays B→Xulν, and the determination of the Cabibbo-Kobayashi-Maskawa matrix element |Vub|. The analysis is based on a sample of 383x106 Υ(4S) decays into BB pairs collected with the BABAR detector at the SLAC PEP-II e+e- storage rings. We select events using the invariant mass MX of the hadronic system, the invariant mass squared, q2, of the lepton and neutrino pair, the kinematic variable P+, or one of their combinations. We then determine partial branching fractions in limited regions of phase space: ΔB=(1.18±0.09stat±0.07syst±0.01theor)x10-3 (MX<1.55 GeV/c2), ΔB=(0.95±0.10stat±0.08syst±0.01theor)x10-3 (P+<0.66 GeV/c), and ΔB=(0.81±0.08stat±0.07syst±0.02theor)x10-3 (MX<1.7 GeV/c2, q2>8 GeV2/c4). Corresponding values of |Vub| are extracted using several theoretical calculations
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(c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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BEAUTY MESONS, BEAUTY PARTICLES, BOSONS, DECAY, DIMENSIONLESS NUMBERS, ELEMENTARY PARTICLES, FERMIONS, HADRONS, INTERACTIONS, LEPTONS, MASSLESS PARTICLES, MATHEMATICAL SPACE, MATRICES, MESONS, NATIONAL ORGANIZATIONS, PARTICLE DECAY, PARTICLE PRODUCTION, PSEUDOSCALAR MESONS, SPACE, US DOE, US ERDA, US ORGANIZATIONS, WEAK PARTICLE DECAY
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