{
  "abstract": "We study the sensitivity of the proposed DarkSHINE experiment to displaced dark photon decays, $A'\\to e^+e^-$, using an 8~GeV electron beam incident on a tungsten target. We consider $2m_e<m_{A'}<2m_μ$ and assume a unit branching fraction to electron--positron pairs. Signal events generated at tree level with \\textsc{CalcHEP} are propagated through a detailed \\textsc{Geant4} detector simulation. A close tracker, graph-neural-network-based track reconstruction, and displaced vertex selections suppress prompt pair-production and photon-conversion backgrounds, while calorimeter and invariant-mass requirements render hadronic backgrounds negligible. Extrapolation of the residual prompt-background distribution yields 0.3 expected events for $9\\times10^{14}$ electrons on target. The median expected 90\\% confidence-level exclusion covers masses of approximately 30--70~MeV and kinetic mixing parameters from approximately $5\\times10^{-5}$ to $2\\times10^{-4}$. This visible decay search complements DarkSHINE searches for invisible dark photon decays.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.18534",
  "author_total": 6,
  "authors": [
    {
      "name": "Zejia Lu"
    },
    {
      "name": "Huayang Wang"
    },
    {
      "name": "Xiang Chen"
    },
    {
      "name": "Jiahui Wu"
    },
    {
      "name": "Yulei Zhang"
    },
    {
      "name": "Liang Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8b7vxrqd7ngpe.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.18534",
  "fulltext_url": null,
  "id": "8b7vxrqd7ngpe",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.18534",
  "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"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7213505441",
  "pdf_url": "https://arxiv.org/pdf/2609.18534",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8b7vxrqd7ngpe.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:37Z",
      "native_id": "2609.18534",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.18534"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Search for Visible Dark Photon Decays at the Future SHINE Facility with the DarkSHINE Experiment",
  "title_text": "Search for Visible Dark Photon Decays at the Future SHINE Facility with the DarkSHINE Experiment",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:37Z",
  "url": "https://research.draconitic.com/paper/8b7vxrqd7ngpe",
  "venue": "arXiv",
  "versions": []
}