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@ARTICLE{Blekman:619033,
      author       = {Blekman, Freya and Canelli, Florencia and De Moor,
                      Alexandre and Gautam, Kunal and Ilg, Armin and Macchiolo,
                      Anna and Ploerer, Eduardo},
      title        = {{T}agging more quark jet flavours at {FCC}-ee at 91 {G}e{V}
                      with a transformer-based neural network},
      reportid     = {PUBDB-2024-07333, arXiv:2406.08590. DESY-24-086},
      year         = {2024},
      note         = {Version submitted to the European Physical Journal C},
      abstract     = {Jet flavour tagging is crucial in experimental high-energy
                      physics. A tagging algorithm, DeepJetTransformer, is
                      presented, which exploits a transformer-based neural network
                      that is substantially faster to train. The
                      DeepJetTransformer network uses information from particle
                      flow-style objects and secondary vertex reconstruction as is
                      standard for $b$- and $c$-jet identification supplemented by
                      additional information, such as reconstructed V$^0$s and
                      $K^{\pm}/\pi^{\pm}$ discrimination, typically not included
                      in tagging algorithms at the LHC. The model is trained as a
                      multiclassifier to identify all quark flavours separately
                      and performs excellently in identifying $b$- and $c$-jets.
                      An $s$-tagging efficiency of $40\\%$ can be achieved with a
                      $10\\%$$ud$-jet background efficiency. The impact of
                      including V$^0$s and $K^{\pm}/\pi^{\pm}$ discrimination is
                      presented. The network is applied on exclusive $Z \to
                      q\bar{q}$ samples to examine the physics potential and is
                      shown to isolate $Z \to s\bar{s}$ events. Assuming all other
                      backgrounds can be efficiently rejected, a $5\sigma$
                      discovery significance for $Z \to s\bar{s}$ can be achieved
                      with an integrated luminosity of $60~\text{nb}^{-1}$,
                      corresponding to less than a second of the FCC-ee run plan
                      at the $Z$ resonance.},
      cin          = {CMS},
      ddc          = {530},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe
                      (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-H253)FCC-20190101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2406.08590},
      howpublished = {arXiv:2406.08590},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2406.08590;\%\%$},
      doi          = {10.3204/PUBDB-2024-07333},
      url          = {https://bib-pubdb1.desy.de/record/619033},
}