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@ARTICLE{Aad:636991,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{S}earch for new physics in final states with semivisible
                      jets or anomalous signatures using the {ATLAS} detector},
      journal      = {Physical review / D},
      volume       = {112},
      number       = {1},
      issn         = {2470-0010},
      address      = {Ridge, NY},
      publisher    = {American Physical Society},
      reportid     = {PUBDB-2025-03722, arXiv:2505.01634. CERN-EP-2025-101},
      pages        = {012021},
      year         = {2025},
      note         = {All figures including auxiliary figures are available at
                      https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2021-19},
      abstract     = {A search is presented for hadronic signatures of beyond the
                      Standard Model (BSM) physics, with an emphasis on signatures
                      of a strongly coupled hidden dark sector accessed via
                      resonant production of a Z′ mediator. The ATLAS experiment
                      dataset collected at the Large Hadron Collider from 2015 to
                      2018 is used, consisting of proton-proton collisions at
                      $\sqrt{s}$ = 13 TeV and corresponding to an integrated
                      luminosity of 140 fb$^{-1}$. The Z′ mediator is considered
                      to decay to two dark quarks, which each hadronize and decay
                      to showers containing both dark and Standard Model
                      particles, producing a topology of interacting and
                      noninteracting particles within a jet known as
                      “semivisible.” Machine learning methods are used to
                      select these dark showers and reject the dominant background
                      of mismeasured multijet events, including an anomaly
                      detection approach to preserve broad sensitivity to a
                      variety of BSM topologies. A resonance search is performed
                      by fitting the transverse mass spectrum based on a
                      functional form background estimation. No significant excess
                      over the expected background is observed. Results are
                      presented as limits on the production cross section of
                      semivisible jet signals, parametrized by the fraction of
                      invisible particles in the decay and the Z′ mass, and by
                      quantifying the significance of any generic Gaussian-shaped
                      mass peak in the anomaly region.},
      cin          = {ATLAS},
      ddc          = {530},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project G:(GEPRIS)469666862 - Präzisionstests des
                      Standardmodells unter der Verwendung von geboosteten
                      W/Z-Bosonen am Large Hadron Collider (469666862) / REALDARK
                      - REAL-time discovery strategies for DARK matter and dark
                      sector signals at the ATLAS detector with Run-3 LHC data
                      (101002463) / DITTO - Comprehensive search for new phenomena
                      in the dilepton spectrum at the LHC (101089007) / BARD -
                      B-resonance Algorithm using Rare Decays (101116429)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)469666862 /
                      G:(EU-Grant)101002463 / G:(EU-Grant)101089007 /
                      G:(EU-Grant)101116429},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2505.01634},
      howpublished = {arXiv:2505.01634},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2505.01634;\%\%$},
      doi          = {10.1103/44zp-mh1q},
      url          = {https://bib-pubdb1.desy.de/record/636991},
}