{
  "annotation_id": "c59e38a6-4ef5-41aa-a7e4-64cbf922aca3",
  "date_created": "2026-03-02T18:00:25.378000Z",
  "date_modified": "2026-03-02T18:00:25.378000Z",
  "file_hash": "e76bb1a3c078b0a33b6c097b2de543a6d8597261f5680947497c80a7029ec0e5",
  "private": false,
  "record": {
    "abstract": "Coherent pi0 photo- and electroproduction on 4He and 12C nuclei is\ninvestigated in the framework of a distorted wave impulse approximation in\nmomentum space. The elementary process is described by the recently developed\nunitary isobar model. Medium effects are considered by introducing a\nphenomenological Delta self-energy. The recent experimental data for 4He and\n12C can be well described over a wide range of energies and emission angles by\nthe assumption that the Delta-nuclear interaction saturates.",
    "arxiv_id": "nucl-th/9906019",
    "authors": [
      "D. Drechsel",
      "L. Tiator",
      "S. S. Kamalov",
      "Shin Nan Yang"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0375-9474(99)00412-1",
    "journal_ref": "Nucl.Phys.A660:423-438,1999",
    "title": "Medium Effects in Coherent Pion Photo- and Electroproduction on 4He and   12C",
    "url": "https://arxiv.org/abs/nucl-th/9906019"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d495ad08-c397-4a46-9e6d-ee0a0129e6df",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}