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Title: | Determinations of |Vub| from Inclusive Semileptonic B Decays with Reduced Model Dependence |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 8-Jun-2006 |
Publisher: | American Physical Society |
Abstract: | We report two novel determinations of | V u b | with reduced model dependence, based on measurements of the mass distribution of the hadronic system in semileptonic B decays. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson from Υ ( 4 S ) → B ¯¯¯ B events. In one approach, we combine the inclusive ¯¯¯ B → X u ℓ ¯ ν rate, integrated up to a maximum hadronic mass m X < 1.67 GeV / c 2 , with a measurement of the inclusive B → X s γ photon energy spectrum. We obtain | V u b | = ( 4.43 ± 0.38 stat ± 0.25 syst ± 0.29 theo ) × 10 − 3 . In another approach we measure the total ¯¯¯ B → X u ℓ ¯ ν rate over the full phase space and find | V u b | = ( 3.84 ± 0.70 stat ± 0.30 syst ± 0.10 theo ) × 10 − 3 . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.96.221801 |
It is part of: | Physical Review Letters, 2006, vol. 96, num. 22, p. 221801 |
URI: | http://hdl.handle.net/2445/140510 |
Related resource: | https://doi.org/10.1103/PhysRevLett.96.221801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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