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@ARTICLE{Aad:442375,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{E}vidence for $t\bar{t}t\bar{t}$ production in the
                      multilepton final state in proton-proton collisions at
                      $\sqrt{s}$=13 {T}e{V} with the {ATLAS} detector},
      reportid     = {PUBDB-2020-03020, arXiv:2007.14858. CERN-EP-2020-111},
      year         = {2020},
      note         = {44 pages total, author list starting page 28, 7 figures, 4
                      tables, submitted to EPJC. All figures including auxiliary
                      figures are available at
                      http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2018-05/},
      abstract     = {A 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 13 TeV
                      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$^{+7}_{-6}$ 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.},
      keywords     = {p p: scattering (autogen) / top: pair production (autogen)
                      / cross section: measured (autogen) / jet: multiplicity
                      (autogen) / jet: flavor (autogen) / background (autogen) /
                      lepton (autogen) / ATLAS (autogen) / CERN LHC Coll (autogen)
                      / kinematics (autogen) / same sign (autogen) / electron
                      (autogen) / muon (autogen)},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611)},
      pid          = {G:(DE-HGF)POF3-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2007.14858},
      howpublished = {arXiv:2007.14858},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2007.14858;\%\%$},
      doi          = {10.3204/PUBDB-2020-03020},
      url          = {https://bib-pubdb1.desy.de/record/442375},
}