{
  "annotation_id": "8306b9e7-ff77-438d-8bf8-28c24b57216d",
  "date_created": "2026-03-02T18:00:15.529000Z",
  "date_modified": "2026-03-02T18:00:15.529000Z",
  "file_hash": "13380d96e9c0197e2f46d1a64160ae7dbca8b46daae375554120e2aff29fe8ec",
  "private": false,
  "record": {
    "abstract": "In this paper, we present our study on the $\\eta$ photoproduction based on\nthe chiral quark model. We find that quark model provides a very good\ndescription of the $\\eta$ production with much less parameters, and the\nthreshold region is not a reliable source to determine the $\\eta NN$ coupling\nconstant due to its strong dependence on the properties of the resonance\n$S_{11}(1535)$. We suggest that the systematic data in $E_{lab}=1.2 \\sim 1.4$\nGeV region may help us to determine the $\\eta NN$ coupling constant more\nprecisely.\n  The structure of the resonance $S_{11}(1535)$ is discussed, we find that the\nrecent data from Mainz group bring the helicity amplitude much closer to the\nquark model prediction. However, more studies need to be done to understand the\nlarge $\\eta N$ branching ratio of the resonance $S_{11}(1535)$. Our results\nshow that the quark model is a very good approach to study the underlying\nstructure of baryon resonances from the meson photoproduction data.",
    "arxiv_id": "nucl-th/9506033",
    "authors": [
      "Zhenping Li"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevD.52.4961",
    "journal_ref": "Phys.Rev. D52 (1995) 4961-4970",
    "title": "The eta Photoproduction of Nucleons and The structure of the Resonance   S11(1535) in The Quark Model",
    "url": "https://arxiv.org/abs/nucl-th/9506033"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0a69d52a-f729-4c19-8b1d-7cae3ce55545",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}