Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/140654
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dc.contributor.authorGraugés Pous, Eugeni-
dc.contributor.authorBABAR Collaboration-
dc.date.accessioned2019-09-20T14:04:01Z-
dc.date.available2019-09-20T14:04:01Z-
dc.date.issued2005-07-21-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/2445/140654-
dc.description.abstractWe present results from an analysis of B 0 ( ¯¯¯ B 0 ) → ρ + ρ − using 232 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction f L = 0.978 ± 0.014 ( stat ) + 0.021 − 0.029 ( syst ) and the C P -violating parameters S L = − 0.33 ± 0.24 ( stat ) + 0.08 − 0.14 ( syst ) and C L = − 0.03 ± 0.18 ( stat ) ± 0.09 ( syst ) . Using an isospin analysis of B → ρ ρ decays, we determine the unitarity triangle parameter α . The solution compatible with the standard model is α = ( 100 ± 13 ) ° .-
dc.format.extent7 p.-
dc.format.mimetypeapplication/pdf-
dc.language.isoeng-
dc.publisherAmerican Physical Society-
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.95.041805-
dc.relation.ispartofPhysical Review Letters, 2005, vol. 95, num. 4, p. 041805-
dc.relation.urihttps://doi.org/10.1103/PhysRevLett.95.041805-
dc.rights(c) American Physical Society, 2005-
dc.subject.classificationFísica de partícules-
dc.subject.classificationExperiments-
dc.subject.otherParticle physics-
dc.subject.otherExperiments-
dc.titleImproved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(¯¯¯B)→ρ+ρ− Decays-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec539077-
dc.date.updated2019-09-20T14:04:01Z-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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