Measurements of (tt)over-barH Production and the CP Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel

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dc.contributor.author The CMS collaboration
dc.contributor.author Sirunyan, A. M.
dc.contributor.author Eerola, P.
dc.contributor.author Forthomme, L.
dc.contributor.author Kirschenmann, H.
dc.contributor.author Osterberg, K.
dc.contributor.author Voutilainen, M.
dc.contributor.author Brücken, E.
dc.contributor.author Garcia, F.
dc.contributor.author Havukainen, J.
dc.contributor.author Heikkila, J. K.
dc.contributor.author Kim, M.
dc.contributor.author Kinnunen, R.
dc.contributor.author Lampen, T.
dc.contributor.author Lassila-Perini, K.
dc.contributor.author Laurila, S.
dc.contributor.author Lehti, S.
dc.contributor.author Linden, T.
dc.contributor.author Siikonen, H.
dc.contributor.author Tuominen, E.
dc.contributor.author Tuominiemi, J.
dc.contributor.author Viinikainen, J.
dc.contributor.author Karimäki, V.
dc.contributor.author Luukka, P.
dc.contributor.author Tuuva, T.
dc.date.accessioned 2020-11-17T13:51:01Z
dc.date.available 2020-11-17T13:51:01Z
dc.date.issued 2020-08-05
dc.identifier.citation The CMS Collaboration , Sirunyan , A M , Eerola , P , Forthomme , L , Kirschenmann , H , Osterberg , K , Voutilainen , M , Brücken , E , Garcia , F , Havukainen , J , Heikkila , J K , Kim , M , Kinnunen , R , Lampen , T , Lassila-Perini , K , Laurila , S , Lehti , S , Linden , T , Siikonen , H , Tuominen , E , Tuominiemi , J , Viinikainen , J , Karimäki , V , Luukka , P & Tuuva , T 2020 , ' Measurements of (tt)over-barH Production and the CP Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel ' , Physical Review Letters , vol. 125 , no. 6 , 061801 . https://doi.org/10.1103/PhysRevLett.125.061801
dc.identifier.other PURE: 150596169
dc.identifier.other PURE UUID: ad6b27c9-075b-4bf7-8108-c438fd3e50ac
dc.identifier.other WOS: 000555785600002
dc.identifier.other ORCID: /0000-0002-7073-7767/work/83839318
dc.identifier.other ORCID: /0000-0003-4807-0414/work/83840388
dc.identifier.other ORCID: /0000-0002-5200-6477/work/83840795
dc.identifier.other ORCID: /0000-0001-7507-8636/work/83841320
dc.identifier.other ORCID: /0000-0003-2039-5874/work/83841618
dc.identifier.other ORCID: /0000-0002-4023-7964/work/83841741
dc.identifier.other ORCID: /0000-0003-0392-8691/work/83841823
dc.identifier.other ORCID: /0000-0001-7369-2536/work/83841836
dc.identifier.other ORCID: /0000-0003-2898-6900/work/83841852
dc.identifier.other ORCID: /0000-0002-0538-1469/work/83843263
dc.identifier.other ORCID: /0000-0003-2530-4265/work/87353109
dc.identifier.uri http://hdl.handle.net/10138/321595
dc.description.abstract The first observation of the (tt) over barH process in a single Higgs boson decay channel with the full reconstruction of the final state (H -> gamma gamma) is presented, with a significance of 6.6 standard deviations (sigma). The CP structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure CP-odd structure of the top Yukawa coupling at 3.2 sigma. The measurements are based on a sample of protonproton collisions at a center-of-mass energy root s = 13 TeV collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb(-1). The cross section times branching fraction of the (tt) over barH process is measured to be sigma B-(tt) over barH(gamma gamma) = 1.56(-0.32)(+0.34) th, which is compatible with the standard model prediction of 1.13(-0.11)(+0.08) fb. The fractional contribution of the CP-odd component is measured to be f(CP)(Hu) = 0.00 +/- 0.33. en
dc.format.extent 18
dc.language.iso eng
dc.relation.ispartof Physical Review Letters
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 114 Physical sciences
dc.title Measurements of (tt)over-barH Production and the CP Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel en
dc.type Article
dc.contributor.organization Department of Physics
dc.contributor.organization Helsinki Institute of Physics
dc.contributor.organization Eija Tuominen / Principal Investigator
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1103/PhysRevLett.125.061801
dc.relation.issn 0031-9007
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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