Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/186440
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dc.contributor.authorCamboni, Alessandro-
dc.contributor.authorCoquereau, S.-
dc.contributor.authorGarrido Beltrán, Lluís-
dc.contributor.authorGascon, D.-
dc.contributor.authorGraciani Diaz, Ricardo-
dc.contributor.authorGraugés Pous, Eugeni-
dc.contributor.authorMarin Benito, Carla-
dc.contributor.authorPicatoste Olloqui, E.-
dc.contributor.authorRives Molina, V.-
dc.date.accessioned2022-06-08T13:55:48Z-
dc.date.available2022-06-08T13:55:48Z-
dc.date.issued2017-09-
dc.identifier.issn0370-2693-
dc.identifier.urihttp://hdl.handle.net/2445/186440-
dc.description.abstractThe observation of the decay Xi(-)(b)-> J/psi Lambda K- is reported, using a data sample corresponding to an integrated luminosity of 3 fb(-1), collected by the LHCb detector in pp collisions at centre-of-mass energies of 7 and 8 TeV. The production rate of Xi(-)(b) baryons detected in the decay Xi(-)(b) -> J/psi Lambda K- is measured relative to that of Lambda(0)(b) baryons using the decay Lambda(0)(b) -> J/psi Lambda. Integrated over the b-baryon transverse momentum p(T) < 25 GeV/c and rapidity 2.0 < y < 4.5, the measured ratio is f Xi(-)(b/) f Lambda(0)(b) B(Xi(-)(b)-> J/psi Lambda K-) / B(Lambda(0)(b)-> J/psi Lambda) = (4.19 +/- 0.29 (stat) +/- 0.15 (syst)) x 10(-2), where f(Xi)(b)(-) band f(Lambda)(b)(0)are the fragmentation fractions of b ->Xi(-)(b)and b ->Lambda(0)(b)transitions, and ss represents the branching fraction of the corresponding b- baryon decay. The mass difference between Xi(-)(b) and Lambda(0)(b) baryons is measured to be M(Xi(-)(b))-M(Lambda(0)(b)) = 177.08 +/- 0.47 (stat) +/- 0.16 (syst) MeV/c(2).-
dc.format.extent10 p.-
dc.format.mimetypeapplication/pdf-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1016/j.physletb.2017.06.045-
dc.relation.ispartofPhysics Letters B, 2017, vol. 772, p. 265-273-
dc.relation.urihttps://doi.org/10.1016/j.physletb.2017.06.045-
dc.rightscc-by (c) Camboni, Alessandro et al., 2017-
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/-
dc.sourceArticles publicats en revistes (Física Quàntica i Astrofísica)-
dc.subject.classificationHadrons-
dc.subject.classificationGran Col·lisionador d'Hadrons-
dc.subject.classificationFísica de partícules-
dc.subject.classificationExperiments-
dc.subject.otherHadrons-
dc.subject.otherLarge Hadron Collider (France and Switzerland)-
dc.subject.otherParticle physics-
dc.subject.otherExperiments-
dc.titleObservation of the Ξb- → J / ψΛK- decay-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec678014-
dc.date.updated2022-06-08T13:55:48Z-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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