{
  "abstract": "The proposed high-luminosity Super Tau-Charm Facility (STCF) offers a clean experimental environment for threshold studies of exotic hadrons. In this Letter, we evaluate the expected significance for the fully-charmed vector tetraquark candidate $T_{4c}$ in the $e^+e^- \\to η_c J/ψ$ channel at the STCF. Using Monte Carlo simulations of an energy scan from $\\sqrt{s}=6.71$ to $6.79~\\mathrm{GeV}$ with $100~\\mathrm{fb}^{-1}$ per point, we adopt a high-efficiency single-tag (ST) reconstruction of $J/ψ$ leptonic decays as the primary strategy, with a double-tag (DT) reconstruction of $η_c \\to K^+K^-π^0$ retained as an independent cross-check. Because the signal cross section is governed by the still-uncertain dielectron width $Γ_{ee}$, we consider three benchmark hypotheses, $Γ_{ee}=0.25, 0.5, 1~\\mathrm{eV}$. The corresponding expected ST significances are $5.1\\,σ$, $10.6\\,σ$, and $20.5\\,σ$, respectively. These results indicate that the STCF can provide meaningful sensitivity to fully-charmed tetraquark states near threshold.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.25870",
  "author_total": 6,
  "authors": [
    {
      "name": "Zhuojuan Dong"
    },
    {
      "name": "Xiaorong Zhou"
    },
    {
      "name": "Xiaorui Lv"
    },
    {
      "name": "Zhengyun You"
    },
    {
      "name": "Jin Zhang"
    },
    {
      "name": "Cong Geng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/73ev9ryd2r6mf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.25870",
  "fulltext_url": null,
  "id": "73ev9ryd2r6mf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.25870",
  "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",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7214085066",
  "pdf_url": "https://arxiv.org/pdf/2609.25870",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/73ev9ryd2r6mf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.25870",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.25870"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Feasibility Study of $e^+e^-\\to η_cJ/ψ$ Production and Fully-Charmed Tetraquark Searches at STCF",
  "title_text": "Feasibility Study of e^+e^-→ η_cJ/ψ Production and Fully-Charmed Tetraquark Searches at STCF",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/73ev9ryd2r6mf",
  "venue": "arXiv",
  "versions": []
}