{
  "annotation_id": "73a34c11-d561-407a-81a0-673610b12f79",
  "date_created": "2026-03-02T18:00:14.819000Z",
  "date_modified": "2026-03-02T18:00:14.819000Z",
  "file_hash": "5f773b07937ce68b72b589b3ec735e314d4a2199c04d68930d595222e6ad1420",
  "private": false,
  "record": {
    "abstract": "Quasifree $\\eta$ photoproduction from nuclei is studied in the Distorted Wave\nImpulse Approximation (DWIA). The elementary eta production operator contains\nBorn terms, vector meson and nucleon resonance contributions and provides an\nexcellent description of the recent low energy Mainz measurements on the\nnucleon. The resonance sector includes the $S_{11}(1535)$, $P_{11}(1440)$ and\n$D_{13}(1520)$ states whose couplings are fixed by independent electromagnetic\nand hadronic data. Different models for the $\\eta N$ t-matrix are used to\nconstruct a simple $\\eta A$ optical potential based on a $t\n\\rho$-approximation. We find that the exclusive $A(\\gamma,\\eta N)B$ process can\nbe used to study medium modifications of the $N^*$ resonances, particularly if\nthe photon asymmetry can be measured. The inclusive $A(\\gamma, \\eta)X$ reaction\nis compared to new data obtained on $^{12}C$, $^{40}Ca$, and is found to\nprovide a clear distinction between different models for the $\\eta N$ t-matrix.",
    "arxiv_id": "nucl-th/9601001",
    "authors": [
      "F. X Lee",
      "L. E. Wright",
      "C. Bennhold",
      "L. Tiator"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/0375-9474(96)80006-D",
    "journal_ref": "Nucl.Phys. A603 (1996) 345-366",
    "title": "Quasifree Eta Photoproduction from Nuclei",
    "url": "https://arxiv.org/abs/nucl-th/9601001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "66b411f1-d3ce-459b-9da1-999ad6d7aead",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}