Evidence for tt¯ tt¯ production in the multilepton final state in proton–proton collisions at √s=13 TeV with the ATLAS detector
AffiliationDepartment of Physics, University of Arizona
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CitationAad, G., Abbott, B., Abbott, D.C. et al. Evidence for tt¯tt¯ production in the multilepton final state in proton–proton collisions at s√=13 TeV with the ATLAS detector. Eur. Phys. J. C 80, 1085 (2020).
JournalEuropean Physical Journal C
RightsCopyright © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License.
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AbstractA search is presented for four-top-quark production using an integrated luminosity of 139 fb- 1 of proton–proton collision data at a centre-of-mass energy of 13TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be 24-6+7 fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 4.3 (2.4) standard deviations and provides evidence for this process. © 2020, CERN for the benefit of the ATLAS collaboration.
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VersionFinal published version
Except where otherwise noted, this item's license is described as Copyright © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License.