{
  "abstract": "We introduce the lattice quark potential model (LQPM), which discretizes the nonrelativistic quark potential model on a periodic cubic lattice and diagonalizes the resulting many-body Hamiltonian exactly. Unlike variational approaches, which provide only upper bounds on the energy, LQPM removes this variational bias, and its remaining finite-volume uncertainty is removed by extrapolation. Formulated directly in coordinate space, the method is indifferent to the specific form of the potential and accommodates arbitrary interactions, such as including three-body forces and spin-orbit and tensor couplings, that are difficult to treat in conventional few-body approaches. As a benchmark, the charmonium and $Ω_{ccc}$ spectra are reproduced within a few MeV of experiment. For the fully charmed tetraquark $cc\\bar{c}\\bar{c}$, we obtain a $J^P=0^+$ ground state at $5934.8(13)~\\mathrm{MeV}$, $33.2(13)~\\mathrm{MeV}$ below the $η_cη_c$ threshold, unambiguously identified as a deeply bound tetraquark whose existence is robust against the choice of potential. Such a state can decay into two dileption pairs $2(e^+e^-)$ via $J/ψe^+e^-$, with significance similar to $X(6400)$, or about one order of magnitude smaller. Lying below the lowest strong-decay channel, it can decay only through electromagnetic and weak interactions. Our results establish exact lattice diagonalization as a controlled, systematically improvable, and broadly applicable route to multiquark spectroscopy, providing a quantitative benchmark for the strong interaction and valuable guidance for future experimental searches for exotic hadrons.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.07818",
  "author_total": 4,
  "authors": [
    {
      "name": "Zhenyu Zhang"
    },
    {
      "name": "Bing-Nan Lu"
    },
    {
      "name": "Qian Wang"
    },
    {
      "name": "Qiang Zhao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6ya01pq9q4r9h.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.07818",
  "fulltext_url": null,
  "id": "6ya01pq9q4r9h",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.07818",
  "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-lat"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7221024921",
  "pdf_url": "https://arxiv.org/pdf/2610.07818",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6ya01pq9q4r9h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:22Z",
      "native_id": "2610.07818",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.07818"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-lat",
      "subfield": "high-energy"
    }
  ],
  "title": "Fully charmed tetraquarks on the Lattice with controlled errors",
  "title_text": "Fully charmed tetraquarks on the Lattice with controlled errors",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/6ya01pq9q4r9h",
  "venue": "arXiv",
  "versions": []
}