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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.accessioned2021-05-07T04:25:21Z
dc.date.accessioned2023-10-02T06:48:44Z
dc.date.available2021-05-07T04:25:21Z
dc.date.available2023-10-02T06:48:44Z
dc.date.created2020-11
dc.date.issued2021-02
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3489
dc.description.abstractThe decays B 0 s → J/ψπ+π −K+K− are studied using a data set corresponding to an integrated luminosity of 9 fb−1 , collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The decays B 0 s → J/ψK∗0K∗0 and B 0 s → χc1(3872)K+K−, where the K+K− pair does not originate from a φ meson, are observed for the first time. Precise measurements of the ratios of branching fractions between intermediate χc1(3872)φ, J/ψK∗0K∗0 , ψ(2S)φ and χc1(3872)K+K− states are reported. A structure, denoted as X(4740), is observed in the J/ψφ mass spectrum and, assuming a Breit-Wigner parameterisation, its mass and width are determined to be mX(4740) = 4741 ± 6 ± 6 MeV/c2 , ΓX(4740) = 53 ± 15 ± 11 MeV , where the first uncertainty is statistical and the second is systematic. In addition, the most precise single measurement of the mass of the B 0 s meson is performed and gives a value of mB0 s = 5366.98 ± 0.07 ± 0.13 MeV/c2 .eng
dc.format.extent34 p.cat
dc.language.isoengcat
dc.publisherSpringercat
dc.relation.ispartofJournal of High Energy Physics, 2021, No. 24cat
dc.rightsAttribution 4.0 International
dc.rights© L'autor/a
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.otherQuarkscat
dc.subject.otherInteraccions d'hadronscat
dc.titleStudy of B0 s → J/ψπ+π −K+K− decayscat
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/10.1007/JHEP02(2021)024cat


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