Measurement of the cross section for top quark pair production in association with a W or Z boson 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 2018-10-02T09:59:01Z
dc.date.available 2018-10-02T09:59:01Z
dc.date.issued 2018-08-03
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 2018 , ' Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV ' , Journal of High Energy Physics , vol. 2018 , no. 8 , 011 . https://doi.org/10.1007/JHEP08(2018)011 en
dc.identifier.issn 1029-8479
dc.identifier.other PURE: 116270032
dc.identifier.other PURE UUID: 03032b72-ba80-4f81-bcca-8bca3d6946f4
dc.identifier.other WOS: 000440833700003
dc.identifier.other Scopus: 85052077161
dc.identifier.other ORCID: /0000-0001-7507-8636/work/48889072
dc.identifier.other ORCID: /0000-0003-2039-5874/work/48889143
dc.identifier.other ORCID: /0000-0003-2898-6900/work/48889275
dc.identifier.other ORCID: /0000-0002-5200-6477/work/61593125
dc.identifier.other ORCID: /0000-0001-7369-2536/work/61901576
dc.identifier.other ORCID: /0000-0002-7073-7767/work/61592238
dc.identifier.other ORCID: /0000-0002-0538-1469/work/68618148
dc.identifier.uri http://hdl.handle.net/10138/246360
dc.description.abstract A measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb(-1), collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three-and four-lepton final states. The production cross sections are measured to be sigma(t (t) over barW) = 0.77(-0.11)(+0.12)(stat)(-0.12)(+0.13) pb and sigma(t (t) over barZ) = 0.99(-0.08)(+0.09) (stat)(-0.10)(+0.12) (syst) pb. The expected (observed) signal signi fi cance for the sigma(t (t) over barW production in same-sign dilepton channel is found to be 4.5 (5.3) standard deviations, while for the t (t) over barZ production in three- and four-lepton channels both the expected and the observed signi fi cances are found to be in excess of 5 standard deviations. The results are in agreement with the standard model predictions and are used to constrain the Wilson coe ffi cients for eight dimension-six operators describing new interactions that would modify t (t) over barW and t (t) over barZ production. en
dc.format.extent 50
dc.language.iso eng
dc.relation.ispartof Journal of High Energy Physics
dc.rights en
dc.subject 114 Physical sciences en
dc.subject Hadron-Hadron scattering (experiments) en
dc.subject Top physics en
dc.subject COUPLINGS en
dc.title Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at root s=13 TeV en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1007/JHEP08(2018)011
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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