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dc.contributorUniversitat Ramon Llull. La Salle
dc.contributorCERN
dc.contributor.authorCalvo Gómez, Míriam
dc.contributor.authorGolobardes, Elisabet
dc.contributor.authorVilasís Cardona, Xavier
dc.contributor.authorLHCb Collaboration - CERN
dc.date.accessioned2021-07-20T17:53:39Z
dc.date.accessioned2023-10-02T06:26:21Z
dc.date.available2021-07-20T17:53:39Z
dc.date.available2023-10-02T06:26:21Z
dc.date.issued2021-01
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3129
dc.description.abstractUsing a proton-proton collision data sample collected by the LHCb experiment, corresponding to anintegrated luminosity of8.5fb−1, the observation of a new excitedΞ0bresonance decaying to theΞ−bπþfinal state is presented. The state, referred to asΞbð6227Þ0, has a measured mass and naturalwidth ofmðΞbð6227Þ0Þ¼6227:1þ1.4−1.5 0.5MeV andΓðΞbð6227Þ0Þ¼18:6þ5.0−4.1 1.4MeV, wherethe uncertainties are statistical and systematic. The production rate of theΞbð6227Þ0state relative tothat of theΞ−bbaryon in the kinematic region2<η<5andpT<30GeV is measured to befΞbð6227Þ0fΞ−bBðΞbð6227Þ0→Ξ−bπþÞ¼0.045 0.008 0.004;whereBðΞbð6227Þ0→Ξ−bπþÞis the branchingfraction of the decay, andfΞbð6227Þ0andfΞ−brepresent fragmentation fractions. Improved measurements ofthe mass and natural width of the previously observedΞbð6227Þ−state, along with the mass of theΞ−bbaryon, 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. 103cat
dc.rightsAttribution 4.0 International
dc.rights© American Physical Society.
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.otherInteraccions d'hadronscat
dc.subject.otherProtonscat
dc.subject.otherPartícules (Física nuclear)cat
dc.titleObservation of a new Ξ0b 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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Attribution 4.0 International
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