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dc.contributor.authorSirunyan, A. M.pt_BR
dc.contributor.authorSilveira, Gustavo Gil dapt_BR
dc.contributor.authorCMS Collaborationpt_BR
dc.date.accessioned2021-02-12T04:06:55Zpt_BR
dc.date.issued2020pt_BR
dc.identifier.issn1029-8479pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/217948pt_BR
dc.description.abstractDecays of the 125 GeV Higgs boson into a Z boson and a ρ0(770) or ϕ(1020) meson are searched for using proton-proton collision data collected by the CMS experiment at the LHC at √s= 13 TeV. The analysed data set corresponds to an integrated luminosity of 137 fb−1. Events are selected in which the Z boson decays into a pair of electrons or a pair of muons, and the ρ and ϕ mesons decay into pairs of pions and kaons, respectively. No significant excess above the background model is observed. As different polarization states are possible for the decay products of the Z boson and ρ or ϕ mesons, affecting the signal acceptance, scenarios in which the decays are longitudinally or transversely polarized are considered. Upper limits at the 95% confidence level on the Higgs boson branching fractions into Zρ and Zϕ are determined to be 1.04–1.31% and 0.31–0.40%, respectively, where the ranges reflect the considered polarization scenarios; these values are 740–940 and 730–950 times larger than the respective standard model expectations. These results constitute the first experimental limits on the two decay channels.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofThe journal of high energy physics. Trieste. No. 11 (Nov. 2020), 39, 41 p.pt_BR
dc.rightsOpen Accessen
dc.subjectHadron-Hadron scattering (experiments)en
dc.subjectAceleradores de partículaspt_BR
dc.subjectColisões proton-protonpt_BR
dc.subjectHiggs physicsen
dc.subjectBosons de higgspt_BR
dc.subjectParticle and resonance productionen
dc.titleSearch for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ mesonpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001121085pt_BR
dc.type.originEstrangeiropt_BR


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