Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/132910
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dc.contributor.authorBadalov, Alexey-
dc.contributor.authorCalvo Gómez, Míriam-
dc.contributor.authorGarrido Beltrán, Lluís-
dc.contributor.authorGascón Fora, David-
dc.contributor.authorGraciani Díaz, Ricardo-
dc.contributor.authorGraugés Pous, Eugeni-
dc.contributor.authorMarin Benito, Carla-
dc.contributor.authorPicatoste Olloqui, Eduardo-
dc.contributor.authorRives Molina, Vicente José-
dc.contributor.authorVilasis-Cardona, Xavier-
dc.contributor.authorLHCb Collaboration-
dc.date.accessioned2019-05-09T09:33:33Z-
dc.date.available2019-05-09T09:33:33Z-
dc.date.issued2015-12-11-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/2445/132910-
dc.description.abstractUsing a p p collision data sample corresponding to an integrated luminosity of 3.0     fb − 1 , collected by the LHCb detector, we present the first search for the strangeness-changing weak decay Ξ − b → Λ 0 b π − . No b hadron decay of this type has been seen before. A signal for this decay, corresponding to a significance of 3.2 standard deviations, is reported. The relative rate is measured to be f Ξ − b f Λ 0 b B ( Ξ − b → Λ 0 b π − ) = ( 5.7 ± 1. 8 + 0.8 − 0.9 ) × 10 − 4 , where f Ξ − b and f Λ 0 b are the b → Ξ − b and b → Λ 0 b fragmentation fractions, and B ( Ξ − b → Λ 0 b π − ) is the branching fraction. Assuming f Ξ − b / f Λ 0 b is bounded between 0.1 and 0.3, the branching fraction B ( Ξ − b → Λ 0 b π − ) would lie in the range from ( 0.57 ± 0.21 ) % to ( 0.19 ± 0.07 ) % .-
dc.format.extent10 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.115.241801-
dc.relation.ispartofPhysical Review Letters, 2015, vol. 115, num. 24, p. 241801-
dc.relation.urihttps://doi.org/10.1103/PhysRevLett.115.241801-
dc.rightscc by (c) CERN; LHCb Collaboration, 2015-
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/-
dc.subject.classificationFísica de partícules-
dc.subject.classificationExperiments-
dc.subject.otherParticle physics-
dc.subject.otherExperiments-
dc.titleEvidence for the Strangeness-Changing Weak Decay Ξ−b→Λ0bπ−-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec656767-
dc.date.updated2019-05-09T09:33:33Z-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Electrònica)

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