Search for rare decays of Z and Higgs bosons to J/psii and a photon in proton-proton collisions at root s=13 TeV

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor University of Helsinki, Helsinki Institute of Physics en
dc.contributor.author The CMS collaboration
dc.contributor.author Sirunyan, A. M.
dc.contributor.author Eerola, P.
dc.contributor.author Kirschenmann, H.
dc.contributor.author Pekkanen, J.
dc.contributor.author Voutilainen, M.
dc.contributor.author Havukainen, J.
dc.contributor.author Heikkilä, J. K.
dc.contributor.author Järvinen, T.
dc.contributor.author Karimäki, V.
dc.contributor.author Kinnunen, R.
dc.contributor.author Lampén, T.
dc.contributor.author Lassila-Perini, K.
dc.contributor.author Laurila, S.
dc.contributor.author Lehti, S.
dc.contributor.author Lindén, T.
dc.contributor.author Luukka, P.
dc.contributor.author Mäenpää, T.
dc.contributor.author Siikonen, H.
dc.contributor.author Tuominen, E.
dc.contributor.author Tuominiemi, J.
dc.contributor.author Tuuva, T.
dc.date.accessioned 2019-03-25T14:02:01Z
dc.date.available 2019-03-25T14:02:01Z
dc.date.issued 2019-01-30
dc.identifier.citation The CMS Collaboration , Sirunyan , A M , Eerola , P , Kirschenmann , H , Pekkanen , J , Voutilainen , M , Havukainen , J , Heikkilä , J K , Järvinen , T , Karimäki , V , Kinnunen , R , Lampén , T , Lassila-Perini , K , Laurila , S , Lehti , S , Lindén , T , Luukka , P , Mäenpää , T , Siikonen , H , Tuominen , E , Tuominiemi , J & Tuuva , T 2019 , ' Search for rare decays of Z and Higgs bosons to J/psii and a photon in proton-proton collisions at root s=13 TeV ' , European Physical Journal C. Particles and Fields , vol. 79 , no. 2 , 94 . https://doi.org/10.1140/epjc/s10052-019-6562-5 en
dc.identifier.issn 1434-6044
dc.identifier.other PURE: 123512477
dc.identifier.other PURE UUID: bf4d3f42-3c53-4ee8-81b5-2dec49bcd165
dc.identifier.other WOS: 000457328300002
dc.identifier.other ORCID: /0000-0001-7507-8636/work/55884696
dc.identifier.other ORCID: /0000-0003-2039-5874/work/55884814
dc.identifier.other ORCID: /0000-0003-2898-6900/work/55884957
dc.identifier.other ORCID: /0000-0002-5200-6477/work/61593130
dc.identifier.other ORCID: /0000-0001-7369-2536/work/61901581
dc.identifier.other ORCID: /0000-0002-7073-7767/work/61592243
dc.identifier.other ORCID: /0000-0002-0538-1469/work/68618154
dc.identifier.uri http://hdl.handle.net/10138/300384
dc.description.abstract A search is presented for decays of Z and Higgs bosons to a J/ meson and a photon, with the subsequent decay of the J/ to +-. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9fb-1 at =13collected with the CMS detector at the LHC. The observed limit on the ZJ/ decay branching fraction, assuming that the J/ meson is produced unpolarized, is 1.4x10-6 at 95% confidence level, which corresponds to a rate higher than expected in the standard model by a factor of 15. For extreme-polarization scenarios, the observed limit changes from -13.6 to +8.6% with respect to the unpolarized scenario. The observed upper limit on the branching fraction for HJ/ where the J/ meson is assumed to be transversely polarized is 7.6x10-4, a factor of 260 larger than the standard model prediction. The results for the Higgs boson are combined with previous data from proton-proton collisions at =8TeV to produce an observed upper limit on the branching fraction for HJ/ that is a factor of 220 larger than the standard model value. en
dc.format.extent 27
dc.language.iso eng
dc.relation.ispartof European Physical Journal C. Particles and Fields
dc.rights en
dc.subject 114 Physical sciences en
dc.subject PP COLLISIONS en
dc.subject PARTON DISTRIBUTIONS en
dc.subject MASS en
dc.title Search for rare decays of Z and Higgs bosons to J/psii and a photon in proton-proton collisions at root s=13 TeV en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1140/epjc/s10052-019-6562-5
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl
dc.contributor.pbl

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