{
  "abstract": "We investigate a novel class of boosted-object signatures at the LHC, where a high-$p_{\\text{T}}$ fat-jet contains an identifiable hadron or quarkonium state originating from rare or semi-exclusive decays. Unlike conventional boosted jet studies, which focus on multi-prong partonic substructure, our approach probes hybrid configurations such as $W^{\\pm}\\toπ^{\\pm}γ$, where a localized hadronic or quarkonium signal is embedded within a collimated jet. By fine-tuning the signature-oriented, pre-trained Sophon AI model optimized for large-radius jets, and combining it with an event-level BDT and a soft-drop-mass shape fit, we obtain an expected 95\\% CL upper limit of ${\\cal B}(W^{\\pm}\\toπ^{\\pm}γ)<2.78\\times10^{-5}$ for $450\\,\\mathrm{fb}^{-1}$ in our nominal setup. This study serves as a first proof-of-principle demonstration of the ``hadron-in-fat-jet'' paradigm; substantial gains in sensitivity are expected from improved trigger strategies, additional production channels, and dedicated taggers, while the methodology itself is broadly applicable to a wide range of rare Standard Model processes and searches for light or exotic resonances at present and future collider experiments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 056019(2026)",
  "arxiv": "2606.09458",
  "author_total": 7,
  "authors": [
    {
      "name": "Linrui Chen"
    },
    {
      "name": "Tianyi Yang"
    },
    {
      "name": "Zixun Kou"
    },
    {
      "name": "Zijian Wang"
    },
    {
      "name": "Youpeng Wu"
    },
    {
      "name": "Leyun Gao"
    },
    {
      "name": "Qiang Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1tcn5ftzvya34.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.09458",
  "fulltext_url": null,
  "id": "1tcn5ftzvya34",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.09458",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.09458",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1tcn5ftzvya34.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2606.09458",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.09458"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "\"Hadron-in-fat-jet'' AI Tagging to Detect Rare Decays Such as $W^{\\pm}\\toπ^{\\pm}γ$",
  "title_text": "\"Hadron-in-fat-jet'' AI Tagging to Detect Rare Decays Such as W^±→π^±γ",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/1tcn5ftzvya34",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/z3j5-12p5",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}