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Measurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector

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dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, D. C.
dc.contributor.authorAbed, Abud, A.
dc.contributor.authorBelotskiy, K.
dc.contributor.authorBelyaev, N. L.
dc.contributor.authorBulekov, O.
dc.contributor.authorKurova, A.
dc.contributor.authorPonomarenko, D.
dc.contributor.authorProklova, N.
dc.contributor.authorPyatiizbyantseva, D.
dc.contributor.authorRomaniouk, A.
dc.contributor.authorSmirnov, S. Y.
dc.contributor.authorSmirnov, Y.
dc.contributor.authorSoldatov, E. Y.
dc.contributor.authorTimoshenko, S.
dc.contributor.authorVorobev, K.
dc.contributor.authorБелоцкий, Константин Михайлович
dc.contributor.authorБулеков, Олег Владимирович
dc.contributor.authorКурова, Анастасия Сергеевна
dc.contributor.authorПятиизбянцева, Диана Николаевна
dc.contributor.authorРоманюк, Анатолий Самсонович
dc.contributor.authorСмирнов, Сергей Юрьевич
dc.contributor.authorСмирнов, Юрий Сергеевич
dc.contributor.authorСолдатов, Евгений Юрьевич
dc.contributor.authorТимошенко, Сергей Леонидович
dc.contributor.authorВоробьёв, Константин Александрович
dc.date.accessioned2024-11-29T23:55:06Z
dc.date.available2024-11-29T23:55:06Z
dc.date.issued2021
dc.description.abstract© 2021, The Author(s).A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb−1 is presented. Events are selected if they contain a single lepton (electron or muon) or an opposite-sign lepton pair, in association with multiple jets. The events are categorised according to the number of jets and how likely these are to contain b-hadrons. A multivariate technique is then used to discriminate between signal and background events. The measured four-top-quark production cross section is found to be 26−15+17 fb, with a corresponding observed (expected) significance of 1.9 (1.0) standard deviations over the background-only hypothesis. The result is combined with the previous measurement performed by the ATLAS Collaboration in the multilepton final state. The combined four-top-quark production cross section is measured to be 24−6+7 fb, with a corresponding observed (expected) signal significance of 4.7 (2.6) standard deviations over the background-only predictions. It is consistent within 2.0 standard deviations with the Standard Model expectation of 12.0 ± 2.4 fb. [Figure not available: see fulltext.].
dc.identifier.citationMeasurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector / Aad, G. [et al.] // Journal of High Energy Physics. - 2021. - 2021. - № 11. - 10.1007/JHEP11(2021)118
dc.identifier.doi10.1007/JHEP11(2021)118
dc.identifier.urihttps://www.doi.org/10.1007/JHEP11(2021)118
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85120070331&origin=resultslist
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/25038
dc.relation.ispartofJournal of High Energy Physics
dc.titleMeasurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue11
oaire.citation.volume2021
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