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Evidence for CP Violation in B+ -> p(p)over-barK(+) Decays

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Evidence for CP Violation in B+ -> p(p)over-barK(+) 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	2016-04-19T12:23:15Z
dc.date.available	2016-04-19T12:23:15Z
dc.date.issued	2014
dc.identifier.citation	LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo Sánchez Mayordomo, Carlos 2014 Evidence for CP Violation in B+ -> p(p)over-barK(+) Decays Physical Review Letters 113 14 141801-1 141801-9
dc.identifier.uri	http://hdl.handle.net/10550/52831
dc.description.abstract	Three-body B+ -> p (p) over barK(+) and B+ -> p (p) over bar pi(+) decays are studied using a data sample corresponding to an integrated luminosity of 3.0 fb(-1) collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV. Evidence of CP violation in the B+ -> p (p) over barK(+) decay is found in regions of the phase space, representing the first measurement of this kind for a final state containing baryons. Measurements of the forward-backward asymmetry of the light meson in the p (p) over bar rest frame yield A(FB)(p (p) over barK(+), m(p (p) over bar) < 2.85 GeV/c(2)) = 0.495 +/- 0.012 (stat) +/- 0.007 (syst) and A(FB)(p<(p)over bar>pi(+), m(p (p) over bar) < 2.85 GeV/c(2)) = -0.409 +/- 0.033 (stat) +/- 0.006 (syst). In addition, the branching fraction of the decay B+ -> <(Lambda)over bar>(1520)p is measured to be B(B+ -> (Lambda) over bar (1520)p) = (3.15 +/- 0.48 (stat) +/- 0.07 (syst) +/- 0.26 (BF)) x 10(-7), where BF denotes the uncertainty on secondary branching fractions.
dc.language.iso	eng
dc.relation.ispartof	Physical Review Letters, 2014, vol. 113, num. 14, p. 141801-1-141801-9
dc.subject	Física nuclear
dc.title	Evidence for CP Violation in B+ -> p(p)over-barK(+) Decays
dc.type	journal article	es_ES
dc.date.updated	2016-04-19T12:23:15Z
dc.identifier.doi	10.1103/PhysRevLett.113.141801
dc.identifier.idgrec	101839
dc.rights.accessRights	open access	es_ES