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http://hdl.handle.net/2445/131743
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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 | 2019-04-08T10:26:42Z | - |
dc.date.available | 2019-04-08T10:26:42Z | - |
dc.date.issued | 2011-03-24 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131743 | - |
dc.description.abstract | We report the results of a study of the exclusive charmless semileptonic decays, B + → η ( ' ) ℓ + ν and B 0 → π − ℓ + ν , undertaken with approximately 464 × 10 6 B ¯¯¯ B pairs collected at the Υ ( 4 S ) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for B + → η ℓ + ν and B 0 → π − ℓ + ν decays in three and 12 bins of q 2 , respectively, from which we extract the f + ( q 2 ) form-factor shapes and the total branching fractions B ( B + → η ℓ + ν ) = ( 0.36 ± 0.05 stat ± 0.04 syst ) × 10 − 4 and B ( B 0 → π − ℓ + ν ) = ( 1.42 ± 0.05 stat ± 0.07 syst ) × 10 − 4 . We also measure B ( B + → η ′ ℓ + ν ) = ( 0.24 ± 0.08 stat ± 0.03 syst ) × 10 − 4 . We obtain values for the magnitude of the CKM matrix element | V u b | using three different QCD calculations. | - |
dc.format.extent | 16 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/PhysRevD.83.052011 | - |
dc.relation.ispartof | Physical Review D, 2011, vol. 83, num. 5, p. 052011 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.83.052011 | - |
dc.rights | (c) American Physical Society, 2011 | - |
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 | Measurement of the B0→π−ℓ+ν and B+→η(')ℓ+ν branching fractions, the B0→π−ℓ+ν and B+→ηℓ+ν form-factor shapes, and determination of |Vub| | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 601996 | - |
dc.date.updated | 2019-04-08T10:26:42Z | - |
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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601996.pdf | 842.85 kB | Adobe PDF | View/Open |
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