{
  "abstract": "The Prompt Lepton Isolation Tagger (PLIT) is a transformer-based algorithm designed to distinguish prompt leptons (electrons and muons) produced in the primary decays of electroweak gauge bosons from non-prompt leptons produced in hadron decays and from misidentified leptons. It is primarily used in measurements targeting multilepton final states with important backgrounds from non-prompt and misidentified leptons. PLIT exploits information from charged-particle tracks associated with the lepton candidate, together with lepton properties, using a transformer neural network to identify correlations between the tracks and improve the discrimination. Its performance is evaluated using simulated top-quark pair production events and compared with that of previously used lepton isolation algorithms, demonstrating improved prompt lepton efficiency while maintaining high rejection of non-prompt leptons. This article presents the development, performance, and calibration of PLIT for electrons and muons in proton--proton collisions at a centre-of-mass energy of $\\sqrt{s}$=13.6 TeV recorded by the ATLAS experiment at the Large Hadron Collider. Operating points are defined for both electrons and muons, and their efficiencies are calibrated using $Z\\to l^+l^-$ events in Run 3 data, providing data-to-simulation correction factors for physics analyses.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.08194",
  "author_total": 1,
  "authors": [
    {
      "name": "ATLAS Collaboration"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2e1kgs8xz47b4.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.08194",
  "fulltext_url": null,
  "id": "2e1kgs8xz47b4",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.08194",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ex"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.08194",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2e1kgs8xz47b4.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T18:21:30Z",
      "native_id": "2611.08194",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.08194"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Development and performance of a transformer-based lepton isolation algorithm with the ATLAS experiment",
  "title_text": "Development and performance of a transformer-based lepton isolation algorithm with the ATLAS experiment",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:41Z",
  "url": "https://research.draconitic.com/paper/2e1kgs8xz47b4",
  "venue": "arXiv",
  "versions": []
}