{
  "annotation_id": "257aad91-72a5-4164-9bc4-4f0593a4fa8d",
  "date_created": "2026-03-02T18:00:00.903000Z",
  "date_modified": "2026-03-02T18:00:00.903000Z",
  "file_hash": "3d79f8d409e9a6d889e3ee857fa5ccfd18b66b21fb014eef949436204fa1fa7a",
  "private": false,
  "record": {
    "abstract": "A schematic model for hadronic states, based on constituent quarks and\nantiquarks and gluon pairs, is discussed. The phenomenological interaction\nbetween quarks and gluons is QCD motivated. The obtained hadronic spectrum\nleads to the identification of nucleon and $\\Delta$ resonances and to\npentaquark and heptaquark states. The predicted lowest pentaquark state\n($J^{\\pi} = {1/2}^-$) lies at the energy of 1.5 GeV and it is associated to the\nobserved $\\Theta^+(1540)$ state. For heptaquarks ($J^{\\pi} = {1/2}^+, {3/2}^+$)\nthe model predicts the lowest state at 2.5 GeV.",
    "arxiv_id": "nucl-th/0405052",
    "authors": [
      "M. Nunez",
      "S. Lerma",
      "P. O. Hess",
      "S. Jesgarz",
      "O. Civitarese",
      "M. Reboiro"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.70.025201",
    "journal_ref": "Phys.Rev. C70 (2004) 025201",
    "title": "Modelling Pentaquark and Heptaquark States",
    "url": "https://arxiv.org/abs/nucl-th/0405052"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b4817aba-1624-4907-9e19-4dc49fdb032d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}