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@ARTICLE{Aad:632566,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{R}econstruction and identification of pairs of collimated
                      $\tau $-leptons decaying hadronically using $\sqrt{s}=13$
                      {T}e{V} pp collision data with the {ATLAS} detector},
      journal      = {The European physical journal / C},
      volume       = {85},
      number       = {5},
      issn         = {1434-6044},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {PUBDB-2025-02194, arXiv:2411.09357. CERN-EP-2024-267},
      pages        = {561},
      year         = {2025},
      note         = {49 pages in total, author list starting page 32, 10
                      figures, 5 tables, published in Eur. Phys. J. C 85 (2025)
                      561. All figures including auxiliary figures are available
                      at
                      https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TAUP-2020-03/},
      abstract     = {This paper describes an algorithm for reconstructing and
                      identifying a highly collimated hadronically decaying $\tau
                      $-lepton pair with low transverse momentum. When two $\tau
                      $-leptons are highly collimated, their visible decay
                      products might overlap, degrading the reconstruction
                      performance for each of the $\tau $-leptons. A dedicated
                      treatment attempting to tag the $\tau $-lepton pair as a
                      single object is required. The reconstruction algorithm is
                      based on a large radius jet and its associated two leading
                      subjets, and the identification uses a boosted decision tree
                      to discriminate between signatures from $\tau ^+\tau ^-$
                      systems and those arising from QCD jets. The efficiency of
                      the identification algorithm is measured in $Z\gamma $
                      events using proton–proton collision data at $\sqrt{s}=13$
                      TeV collected by the ATLAS experiment at the Large Hadron
                      Collider between 2015 and 2018, corresponding to an
                      integrated luminosity of $139\,\text{ fb}^{-1}$. The
                      resulting data-to-simulation scale factors are close to
                      unity with uncertainties ranging from 26 to 37\%.},
      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)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)469666862 /
                      G:(EU-Grant)101002463 / G:(EU-Grant)101089007},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2411.09357},
      howpublished = {arXiv:2411.09357},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2411.09357;\%\%$},
      doi          = {10.1140/epjc/s10052-025-14075-3},
      url          = {https://bib-pubdb1.desy.de/record/632566},
}