{
  "annotation_id": "82d13399-6ece-4690-a145-25b99098ddf1",
  "date_created": "2026-03-02T18:00:18.799000Z",
  "date_modified": "2026-03-02T18:00:18.799000Z",
  "file_hash": "32f7fe5e621bb1035e40216430f9b347c6b4486602e8fa1dd58b37a637756210",
  "private": false,
  "record": {
    "abstract": "A relativistic model for the quasifree photoproduction of eta meson from\ncomplex nuclei is developed. The interactions between fields are introduced\nthrough effective Lagrangians. Contributions from several nucleon resonances as\nwell as nucleon Born terms and vector meson exchange diagrams are included.\nNucleon and eta wavefunctions are solutions of Dirac and Klein-Gordon\nequations, respectively. Final state interactions of the outgoing particles are\nincluded via optical potentials. The effects of these interactions on the cross\nsections and photon asymmetries are studied and are found to be large.\nCalculations indicate that at energies near threshold the exclusive reaction\ntakes place mainly through formation of the S_{11}(1535) resonance. Comparisons\nwith the non-relativistic calculations show differences between the two\napproaches both for the cross sections and photon asymmetries. We give some\ndetailed predictions for the reaction observables for exclusive photoproduction\non ^{12}C, ^{16}O and ^{40}Ca.",
    "arxiv_id": "nucl-th/9707009",
    "authors": [
      "M. Hedayati-Poor",
      "H. S. Sherif"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.56.1557",
    "journal_ref": "Phys.Rev.C56:1557-1569,1997",
    "title": "Relativistic Calculations for the Exclusive Photoproduction of Eta   Mesons from Complex Nuclei",
    "url": "https://arxiv.org/abs/nucl-th/9707009"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ee2f6ee5-22b4-4b5b-9a91-1accdc98aabc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}