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http://hdl.handle.net/2445/138320
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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 | 2019-07-25T11:51:53Z | - |
dc.date.available | 2019-07-25T11:51:53Z | - |
dc.date.issued | 2009-03-04 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/138320 | - |
dc.description.abstract | We measure branching fractions and integrated rate asymmetries for the rare decays B → K ( * ) l + l − , where l + l − is either e + e − or μ + μ − , using a sample of 384 × 10 6 B ¯¯¯ B events collected with the BABAR detector at the PEP-II e + e − collider. We find no evidence for direct C P or lepton-flavor asymmetries. However, for dilepton masses below the J / ψ resonance, we find evidence for unexpectedly large isospin asymmetries in both B → K l + l − and B → K ∗ l + l − which differ, respectively, by 3.2 σ and 2.7 σ , including systematic uncertainties, from the standard model expectations. | - |
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.102.091803 | - |
dc.relation.ispartof | Physical Review Letters, 2009, vol. 102, num. 9, p. 091803 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.102.091803 | - |
dc.rights | (c) American Physical Society, 2009 | - |
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 | Direct CP, Lepton Flavor, and Isospin Asymmetries in the Decays B→K(*)l+l− | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 577759 | - |
dc.date.updated | 2019-07-25T11:51:53Z | - |
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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577759.pdf | 246.06 kB | Adobe PDF | View/Open |
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