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dc.contributorUniversitat Ramon Llull. La Salle
dc.contributorCERN
dc.contributor.authorLHCb Collaboration - CERN
dc.contributor.authorCalvo Gómez, Míriam
dc.contributor.authorGolobardes, Elisabet
dc.contributor.authorVilasís Cardona, Xavier
dc.date.accessioned2021-04-23T12:34:58Z
dc.date.accessioned2023-10-02T06:49:37Z
dc.date.available2021-04-23T12:34:58Z
dc.date.available2023-10-02T06:49:37Z
dc.date.created2020-10
dc.date.issued2021-01
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3498
dc.description.abstractUsing a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb−1, the observation of a new excited Ξ0 b resonance decaying to the Ξ− b πþ final state is presented. The state, referred to as Ξbð6227Þ0, has a measured mass and natural width of mðΞbð6227Þ0Þ ¼ 6227:1þ1.4 −1.5 0.5 MeV and ΓðΞbð6227Þ0Þ ¼ 18:6þ5.0 −4.1 1.4 MeV, where the uncertainties are statistical and systematic. The production rate of the Ξbð6227Þ0 state relative to that of the Ξ− b baryon in the kinematic region 2 < η < 5 and pT < 30 GeV is measured to be fΞbð6227Þ0 fΞ− b BðΞbð6227Þ0 → Ξ− b πþÞ ¼ 0.045 0.008 0.004; where BðΞbð6227Þ0 → Ξ− b πþÞ is the branching fraction of the decay, and fΞbð6227Þ0 and fΞ− b represent fragmentation fractions. Improved measurements of the mass and natural width of the previously observed Ξbð6227Þ− state, along with the mass of the Ξ− b baryon, are also reported. Both measurements are significantly more precise than, and consistent with, previously reported values.eng
dc.format.extent17 p.cat
dc.language.isoengcat
dc.publisherAmerican Physical Societycat
dc.relation.ispartofPhysical Review D, 2021, Vol. 103, No. 1cat
dc.rightsAttribution 4.0 International
dc.rights© CERN
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherGran col·lisionador d'hadrons (França i Suïssa)cat
dc.subject.otherProtonscat
dc.subject.otherCol·lisions (Física nuclear)cat
dc.titleObservation of a new Ξ0 b statecat
dc.typeinfo:eu-repo/semantics/articlecat
dc.typeinfo:eu-repo/semantics/publishedVersioncat
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapcat
dc.subject.udc539
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.103.012004cat


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Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/
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