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Test of lepton universality using B+ -> K(+)l(+)l(-) decays

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Test of lepton universality using B+ -> K(+)l(+)l(-) decays

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dc.contributor.author	LHCb Collaboration
dc.contributor.author	Martínez Vidal, Fernando
dc.contributor.author	Oyanguren Campos, Arantza
dc.contributor.author	Ruiz Valls, Pablo
dc.contributor.author	Sánchez Mayordomo, Carlos
dc.date.accessioned	2016-04-19T12:20:30Z
dc.date.available	2016-04-19T12:20:30Z
dc.date.issued	2014
dc.identifier.citation	LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo Sánchez Mayordomo, Carlos 2014 Test of lepton universality using B+ -> K(+)l(+)l(-) decays Physical Review Letters 113 15 151601-1 151601-10
dc.identifier.uri	http://hdl.handle.net/10550/52828
dc.description.abstract	A measurement of the ratio of the branching fractions of the B+ -> K+mu(+)mu(-) 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 GeV2/c(4) is measured to be 0.745(-0.074)(+0.090)(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.language.iso	eng
dc.relation.ispartof	Physical Review Letters, 2014, vol. 113, num. 15, p. 151601-1-151601-10
dc.subject	Física nuclear
dc.title	Test of lepton universality using B+ -> K(+)l(+)l(-) decays
dc.type	journal article	es_ES
dc.date.updated	2016-04-19T12:20:31Z
dc.identifier.doi	10.1103/PhysRevLett.113.151601
dc.identifier.idgrec	101836
dc.rights.accessRights	open access	es_ES