{
  "annotation_id": "d68df49a-873f-4a59-a1c2-d7bfed2c14d5",
  "date_created": "2026-03-02T18:00:25.376000Z",
  "date_modified": "2026-03-02T18:00:25.376000Z",
  "file_hash": "d7a69caaa3bc08aa72a2ffb2526cccf108b84825e3ea7ebe7e6f74d4cbddc2c3",
  "private": false,
  "record": {
    "abstract": "The process $\\gamma p \\to \\phi p$ close to threshold is investigated focusing\non the role played by the {\\it s}- and {\\it u}-channel nucleonic resonances.\nFor this purpose, a recent quark model approach, based on the $SU(6)\\otimes\nO(3)$ symmetry with an effective Lagrangian, is extended to the $\\phi$ meson\nphotoproduction. Another non-diffractive process, the {\\it t}-channel $\\pi^0$\nexchange, is also included. The diffractive contribution is produced by the\n{\\it t}-channel Pomeron exchange. Contributions from non-diffractive {\\it s}-\nand {\\it u}-channel process are found small in the case of cross sections and\npolarization observables at forward angles. However, backward angle\npolarization asymmetries show high sensitivity to this non-diffractive process.\nDifferent prescriptions to keep gauge invariance for the Pomeron exchange\namplitudes are investigated. Possible deviations from the exact $SU(6)\\otimes\nO(3)$ symmetry, due to the configuration mixing, are also discussed.",
    "arxiv_id": "nucl-th/9906013",
    "authors": [
      "Q. Zhao",
      "J. -P. Didelez",
      "M. Guidal",
      "B. Saghai"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0375-9474(99)00398-X",
    "journal_ref": "Nucl.Phys. A660 (1999) 323-347",
    "title": "Nucleonic resonance effects in the $\\phi$ meson photoproduction",
    "url": "https://arxiv.org/abs/nucl-th/9906013"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8a3793dd-f2de-45bd-9bb8-1de5990b1d31",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}