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Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays

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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.authorRuiz, Hugo (Ruiz Pérez)
dc.contributor.authorVilasis-Cardona, Xavier
dc.contributor.authorLHCb Collaboration
dc.date.accessioned2019-05-15T12:08:08Z
dc.date.available2019-05-15T12:08:08Z
dc.date.issued2014-10-06
dc.date.updated2019-05-15T12:08:08Z
dc.description.abstractA measurement of the ratio of the branching fractions of the B + → K + μ + μ − and B + → K + e + e − decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0     fb − 1 , recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. The value of the ratio of branching fractions for the dilepton invariant mass squared range 1 < q 2 < 6     GeV 2 / c 4 is measured to be 0.74 5 + 0.090 − 0.074 ( stat ) ± 0.036 ( syst ) . This value is the most precise measurement of the ratio of branching fractions to date and is compatible with the standard model prediction within 2.6 standard deviations.
dc.format.extent10 p.
dc.format.mimetypeapplication/pdf
dc.identifier.idgrec645738
dc.identifier.issn0031-9007
dc.identifier.urihttps://hdl.handle.net/2445/133199
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.113.151601
dc.relation.ispartofPhysical Review Letters, 2014, vol. 113, num. 15, p. 151601
dc.relation.urihttps://doi.org/10.1103/PhysRevLett.113.151601
dc.rights(c) American Physical Society, 2014
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.sourceArticles publicats en revistes (Física Quàntica i Astrofísica)
dc.subject.classificationFísica de partícules
dc.subject.classificationExperiments
dc.subject.otherParticle physics
dc.subject.otherExperiments
dc.titleTest of Lepton Universality Using B+→K+ℓ+ℓ− Decays
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion

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