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http://hdl.handle.net/2445/138426
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DC Field | Value | Language |
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dc.contributor.author | Garra Ticó, Jordi | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-07-26T13:03:42Z | - |
dc.date.available | 2019-07-26T13:03:42Z | - |
dc.date.issued | 2008-05-29 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/138426 | - |
dc.description.abstract | We present partial branching fractions for inclusive charmless semileptonic B decays ¯¯¯ B → X u ℓ ¯ ν , and the determination of the Cabibbo-Kobayashi-Maskawa matrix element | V u b | . The analysis is based on a sample of 383 × 10 6 Υ ( 4 S ) decays into B ¯¯¯ B pairs collected with the BABAR detector at the SLAC PEP-II e + e − storage rings. We select events using the invariant mass M X of the hadronic system, the invariant mass squared, q 2 , 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: Δ B = ( 1.18 ± 0.09 stat ± 0.07 syst ± 0.01 theor ) × 10 − 3 ( M X < 1.55 GeV / c 2 ), Δ B = ( 0.95 ± 0.10 stat ± 0.08 syst ± 0.01 theor ) × 10 − 3 ( P + < 0.66 GeV / c ), and Δ B = ( 0.81 ± 0.08 stat ± 0.07 syst ± 0.02 theor ) × 10 − 3 ( M X < 1.7 GeV / c 2 , q 2 > 8 GeV 2 / c 4 ). Corresponding values of | V u b | are extracted using several theoretical calculations. | - |
dc.format.extent | 7 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.100.171802 | - |
dc.relation.ispartof | Physical Review Letters, 2008, vol. 100, num. 17, p. 171802 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.100.171802 | - |
dc.rights | (c) American Physical Society, 2008 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Measurements of Partial Branching Fractions for ¯¯¯B→Xul¯ν and Determination of |Vub| | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 577710 | - |
dc.date.updated | 2019-07-26T13:03:42Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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577710.pdf | 238.16 kB | Adobe PDF | View/Open |
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