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dc.contributor.authorAad, Georges
dc.contributor.authorAbbott, Brad
dc.contributor.authorAbbott, Dale C.
dc.contributor.authorAbed Abud, Adam
dc.contributor.authorAbeling, Kira
dc.contributor.authorAbhayasinghe, Deshan Kavishka
dc.contributor.authorAbidi, Syed Haider
dc.contributor.authorAbouZeid, Ossama Sherif Alexander
dc.contributor.authorAbraham, Nadine L.
dc.contributor.authorAbramowicz, Halina
dc.contributor.authorBjørke, Kristian
dc.contributor.authorBugge, Magnar Kopangen
dc.contributor.authorCameron, David Gordon
dc.contributor.authorCatmore, James Richard
dc.contributor.authorGaronne, Vincent
dc.contributor.authorGramstad, Eirik
dc.contributor.authorHeggelund, Andreas Løkken
dc.contributor.authorHellesund, Simen
dc.contributor.authorHåland, Even Simonsen
dc.contributor.authorMorisbak, Vanja
dc.contributor.authorOppen, Henrik
dc.contributor.authorOuld-Saada, Farid
dc.contributor.authorPedersen, Maiken
dc.contributor.authorRead, Alexander Lincoln
dc.contributor.authorRye, Eli Bæverfjord
dc.contributor.authorRøhne, Ole Myren
dc.contributor.authorSandaker, Heidi
dc.contributor.authorVadla, Knut Oddvar Høie
dc.contributor.authorBuanes, Trygve
dc.contributor.authorDjuvsland, Julia Isabell
dc.contributor.authorEigen, Gerald
dc.contributor.authorFomin, Nikolai
dc.contributor.authorLee, Graham Richard
dc.contributor.authorLipniacka, Anna
dc.contributor.authorMartin dit Latour, Bertrand
dc.contributor.authorStugu, Bjarne
dc.contributor.authorTræet, Are Sivertsen
dc.contributor.authorAbreu, Henso
dc.contributor.authorAbulaiti, Yiming
dc.contributor.authorAcharya, Bobby S.
dc.contributor.authorAchkar, Baida
dc.contributor.authorAdam, Lennart
dc.contributor.authorAdam-Bourdarios, Claire
dc.contributor.authorAdamczyk, Leszek
dc.contributor.authorAdamek, Lukas
dc.contributor.authorAdelman, Jareed
dc.contributor.authorAdersberger, Michael
dc.contributor.authorAdigüzel, Aytül
dc.contributor.authorAdorni, Sofia
dc.contributor.authorAdye, Tim
dc.contributor.authorATLAS, Collaboration
dc.date.accessioned2021-05-10T09:44:41Z
dc.date.available2021-05-10T09:44:41Z
dc.date.created2020-10-07T15:30:35Z
dc.date.issued2020-08-05
dc.identifier.issn0031-9007
dc.identifier.urihttps://hdl.handle.net/11250/2754587
dc.description.abstractA study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H→γγ), and their production in association with a top quark pair (t¯tH) or single top quark (tH) is studied. The analysis uses 139 fb−1 of proton–proton collision data recorded at a center-of-mass energy of √s=13 TeV with the ATLAS detector at the Large Hadron Collider. Assuming a CP-even coupling, the t¯tH process is observed with a significance of 5.2 standard deviations. The measured cross section times H→γγ branching ratio is 1.64+0.38−0.36(stat)+0.17−0.14(sys) fb, and the measured rate for t¯tH is 1.43+0.33−0.31(stat)+0.21−0.15(sys) times the Standard Model expectation. The tH production process is not observed and an upper limit on its rate of 12 times the Standard Model expectation is set. A CP-mixing angle greater (less) than 43 (−43)° is excluded at 95% confidence level.en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleCP Properties of Higgs Boson Interactions with Top Quarks in the tt¯ H and tH Processes Using H→γγ with the ATLAS Detectoren_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2020 CERN, for the ATLAS Collaborationen_US
dc.source.articlenumber061802en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.doi10.1103/PhysRevLett.125.061802
dc.identifier.cristin1837989
dc.source.journalPhysical Review Lettersen_US
dc.source.pagenumber1-21en_US
dc.subject.nsiVDP::Kjerne- og elementærpartikkelfysikk: 431en_US
dc.subject.nsiVDP::Nuclear and elementary particle physics: 431en_US
dc.identifier.citationPhysical Review Letters. 2020, 125 (6):061802.en_US
dc.source.volume125en_US
dc.source.issue6en_US


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