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.authorAbeling, K.
dc.contributor.authorAbhayasinghe, D.K.
dc.contributor.authorAbidi, S.H.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbulaiti, Y.
dc.contributor.authorAbusleme Hoffman, A.C.
dc.contributor.authorAcharya, B.S.
dc.contributor.authorAchkar, B.
dc.contributor.authorAdam, L.
dc.contributor.authorAdam Bourdarios, C.
dc.contributor.authorAdamczyk, L.
dc.contributor.authorAdamek, L.
dc.contributor.authorAdelman, J.
dc.contributor.authorAdiguzel, A.
dc.contributor.authorAdorni, S.
dc.contributor.authorAdye, T.
dc.contributor.authorAffolder, A.A.
dc.contributor.authorAfik, Y.
dc.contributor.authorAgapopoulou, C.
dc.contributor.authorAgaras, M.N.
dc.contributor.authorAgarwala, J.
dc.contributor.authorAggarwal, A.
dc.contributor.authorAgheorghiesei, C.
dc.contributor.authorAguilar-Saavedra, J.A.
dc.contributor.authorAhmad, A.
dc.contributor.authorAhmadov, F.
dc.contributor.authorAhmed, W.S.
dc.contributor.authorAi, X.
dc.contributor.authorAielli, G.
dc.contributor.authorAkatsuka, S.
dc.contributor.authorAkbiyik, M.
dc.contributor.authorÅkesson, T.P.A.
dc.contributor.authorAkimov, A.V.
dc.contributor.authorAl Khoury, K.
dc.contributor.authorAlberghi, G.L.
dc.contributor.authorAlbert, J.
dc.contributor.authorAlconada Verzini, M.J.
dc.contributor.authorAlderweireldt, S.
dc.contributor.authorAleksa, M.
dc.contributor.authorAleksandrov, I.N.
dc.contributor.authorAlexa, C.
dc.contributor.authorAlexopoulos, T.
dc.contributor.authorAlfonsi, A.
dc.contributor.authorAlfonsi, F.
dc.contributor.authorAlhroob, M.
dc.contributor.authorAli, B.
dc.contributor.authorAli, S.
dc.contributor.authorAliev, M.
dc.contributor.authorAlimonti, G.
dc.contributor.authorAllaire, C.
dc.contributor.authorAllbrooke, B.M.M.
dc.contributor.authorAllport, P.P.
dc.contributor.authorAloisio, A.
dc.contributor.authorAlonso, F.
dc.contributor.authorAlpigiani, C.
dc.date.accessioned2025-03-18T22:23:37Z
dc.date.available2025-03-18T22:23:37Z
dc.date.issued2021-11
dc.descriptionIndexación: Scopus.
dc.description.abstractA 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.]. © 2021, The Author(s).
dc.description.urihttps://link-springer-com.recursosbiblioteca.unab.cl/article/10.1007/JHEP11(2021)118
dc.identifier.citationJournal of High Energy Physics, Volume 2021, Issue 11, November 2021, Article number 118
dc.identifier.doi10.1007/JHEP11(2021)118
dc.identifier.issn1029-8479
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/63815
dc.language.isoen
dc.publisherSpringer Science and Business Media Deutschland GmbH
dc.rights.licenseAttribution 4.0 International CC BY 4.0 Deed
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectHadron-Hadron scattering (experiments)
dc.subjectTop physics
dc.titleMeasurement of the t t¯ t t¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector
dc.typeArtículo
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