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http://hdl.handle.net/2445/131742
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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 | 2019-04-08T10:08:52Z | - |
dc.date.available | 2019-04-08T10:08:52Z | - |
dc.date.issued | 2010-03-30 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131742 | - |
dc.description.abstract | We present a search for the decay B + → ℓ + ν ℓ ( ℓ = τ , μ , or e ) in ( 458.9 ± 5.1 ) × 10 6 B ¯¯¯ B pairs recorded with the BABAR detector at the PEP-II B -factory. We search for these B decays in a sample of B + B − events where one B -meson is reconstructed as B − → D 0 ℓ − ¯ ν X . Using the method of Feldman and Cousins, we obtain B ( B + → τ + ν τ ) = ( 1.7 ± 0.8 ± 0.2 ) × 10 − 4 , which excludes zero at 2.3 σ . We interpret the central value in the context of the standard model and find the B meson decay constant to be f 2 B = ( 62 ± 31 ) × 10 3 MeV 2 . We find no evidence for B + → e + ν e and B + → μ + ν μ and set upper limits at the 90% C.L. B ( B + → e + ν e ) < 0.8 × 10 − 5 and B ( B + → μ + ν μ ) < 1.1 × 10 − 5 . | - |
dc.format.extent | 9 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.81.051101 | - |
dc.relation.ispartof | Physical Review D, 2010, vol. 81, num. 5, p. 051101 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.81.051101 | - |
dc.rights | (c) American Physical Society, 2010 | - |
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 | Search for B+→ℓ+νℓ recoiling against B−→D0ℓ−¯νX | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 601930 | - |
dc.date.updated | 2019-04-08T10:08:52Z | - |
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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601930.pdf | 220.47 kB | Adobe PDF | View/Open |
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