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@ARTICLE{Aad:588854,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{S}earch for leptoquark pair production decaying into $te^-
                      \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final
                      states in $pp$ collisions at 13 {T}e{V} with the {ATLAS}
                      detector},
      reportid     = {PUBDB-2023-04994, arXiv:2306.17642. CERN-EP-2023-087},
      year         = {2023},
      note         = {60 pages in total, author list starting page 43, 11
                      figures, 6 tables, submitted to EPJC. All figures including
                      auxiliary figures are available at
                      http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2020-08},
      abstract     = {A search for leptoquark pair production decaying into $te^-
                      \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in final states with
                      multiple leptons is presented. The search is based on a
                      dataset of $pp$ collisions at $\sqrt{s}$=13 TeV recorded
                      with the ATLAS detector during Run 2 of the Large Hadron
                      Collider, corresponding to an integrated luminosity of
                      139~fb$^{-1}$. Events are selected with two or more light
                      leptons (electron or muon) and at least two jets out of
                      which at least one jet is identified as coming from a
                      $b$-hadron. Four signal regions, with the requirement of at
                      least three light leptons, are considered based on the
                      number of leptons of a given flavour. The main background
                      processes are estimated using dedicated control regions in a
                      simultaneous fit with the signal regions to data. No excess
                      above the Standard Model background prediction is observed
                      and 95\% confidence level limits on the production cross
                      section times branching ratio are derived as a function of
                      the leptoquark mass. Under the assumption of exclusive
                      decays into $te^{-}$ ($t\mu^{-}$), the corresponding lower
                      limit on the scalar mixed-generation leptoquark mass
                      $m_{\mathrm{LQ}_{\mathrm{mix}}^{\mathrm{d}}}$ is at 1.58
                      (1.59) TeV and on the vector leptoquark mass
                      $m_{\tilde{U}_1}$ at 1.67 (1.67) TeV in the minimal coupling
                      scenario and at 1.95 (1.95) TeV in the Yang-Mills scenario.},
      keywords     = {p p: colliding beams (INSPIRE) / leptoquark: mass: lower
                      limit (INSPIRE) / leptoquark: pair production (INSPIRE) / p
                      p: scattering (INSPIRE) / coupling: minimal (INSPIRE) /
                      lepton: multiple production (INSPIRE) / background (INSPIRE)
                      / ATLAS (INSPIRE) / final state: ((n)jet dilepton) (INSPIRE)
                      / final state: ((n)jet 3lepton) (INSPIRE) / final state:
                      ((n)jet 4lepton) (INSPIRE) / jet: bottom (INSPIRE) / bottom:
                      particle identification (INSPIRE) / leptoquark: scalar
                      (INSPIRE) / leptoquark: vector particle (INSPIRE) / muon
                      (INSPIRE) / channel cross section: branching ratio: upper
                      limit (INSPIRE) / mass dependence (INSPIRE) / Yang-Mills
                      (INSPIRE) / electron (INSPIRE) / CERN LHC Coll (INSPIRE) /
                      flavor (INSPIRE) / experimental results (INSPIRE) /
                      leptoquark --> top electron (INSPIRE) / leptoquark --> top
                      muon (INSPIRE) / 13000 GeV-cms (INSPIRE)},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2306.17642},
      howpublished = {arXiv:2306.17642},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2306.17642;\%\%$},
      doi          = {10.3204/PUBDB-2023-04994},
      url          = {https://bib-pubdb1.desy.de/record/588854},
}