Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/132846
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dc.contributor.authorBadalov, Alexey-
dc.contributor.authorCalvo Gómez, Míriam-
dc.contributor.authorCamboni, Alessandro-
dc.contributor.authorCoquereau, Samuel-
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.accessioned2019-05-08T09:44:39Z-
dc.date.available2019-05-08T09:44:39Z-
dc.date.issued2017-02-21-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/2445/132846-
dc.description.abstractA search for the B0→K+K- decay is performed using p p -collision data collected by LHCb. The data set corresponds to integrated luminosities of 1.0 and 2.0 fb-1 at center-of-mass energies of 7 and 8 TeV, respectively. This decay is observed for the first time, with a significance of more than 5 standard deviations. The analysis also results in an improved measurement of the branching fraction for the Bs0→π+π- decay. The measured branching fractions are B (B0→K+K- )=(7.80 ±1.27 ±0.81 ±0.21 )×10-8 and B (Bs0→π+π- )=(6.91 ±0.54 ±0.63 ±0.19 ±0.40 )×10-7 . The first uncertainty is statistical, the second is systematic, the third is due to the uncertainty on the B0→K+π- branching fraction used as a normalization. For the Bs0 mode, the fourth accounts for the uncertainty on the ratio of the probabilities for b quarks to hadronize into Bs0 and B0 mesons.-
dc.format.extent9 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.118.081801-
dc.relation.ispartofPhysical Review Letters, 2017, vol. 118, num. 8, p. 081801-
dc.relation.urihttps://doi.org/10.1103/PhysRevLett.118.081801-
dc.rightscc by (c) CERN; LHCb Collaboration, 2017-
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.titleObservation of the Annihilation Decay Mode B0→K+K−-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec677976-
dc.date.updated2019-05-08T09:44:39Z-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
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