Observation of the Ξ−b → ψ(2S)Ξ− decay and studies of the Ξb(5945)0 baryon in proton-proton collisions at √s = 13 TeV

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dc.contributor.authorHayrapetyan, A.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J.W.
dc.contributor.authorBergauer, T.
dc.contributor.authorChatterjee, S.
dc.contributor.authorDamanakis, K.
dc.date.accessioned2025-03-23T19:16:36Z
dc.date.available2025-03-23T19:16:36Z
dc.date.issued2024
dc.departmentSinop Üniversitesi
dc.description.abstractThe first observation of the decay Ξ− b → ψ(2S)Ξ− and measurement of the branching ratio of Ξ− b → ψ(2S)Ξ− to Ξ− b → J/ψΞ− are presented. The J/ψ and ψ(2S) mesons are reconstructed using their dimuon decay modes. The results are based on proton-proton colliding beam data from the LHC collected by the CMS experiment at √s = 13 TeV in 2016–2018, corresponding to an integrated luminosity of 140 fb−1. The branching fraction ratio is measured to be B(Ξ− b → ψ(2S)Ξ−)/B(Ξ− b → J/ψΞ−) = 0.84+0.21 −0.19 (stat) ± 0.10(syst) ± 0.02(B), where the last uncertainty comes from the uncertainties in the branching fractions of the charmonium states. New measurements of the Ξb(5945)0 baryon mass and natural width are also presented, using the Ξ− bπ+ final state, where the Ξ− b baryon is reconstructed through the decays J/ψΞ−, ψ(2S)Ξ−, J/ψΛK−, and J/ψΣ0K−. Finally, the fraction of Ξ− b baryons produced from Ξb(5945)0 decays is determined. © 2024 CERN, for the CMS Collaboration.
dc.description.sponsorshipCouncil of Scientific and Industrial Research, India, CSIR
dc.description.sponsorshipDST
dc.description.sponsorshipFNRS
dc.description.sponsorshipCNRS
dc.description.sponsorshipNSC
dc.description.sponsorshipIN2P3
dc.description.sponsorshipUM
dc.identifier.doi10.1103/PhysRevD.110.012002
dc.identifier.issn2470-0010
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85199908415
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.110.012002
dc.identifier.urihttps://hdl.handle.net/11486/4157
dc.identifier.volume110
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.ispartofPhysical Review D
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250323
dc.titleObservation of the Ξ−b → ψ(2S)Ξ− decay and studies of the Ξb(5945)0 baryon in proton-proton collisions at √s = 13 TeV
dc.typeArticle

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