{
  "annotation_id": "5e15690f-d2ed-4699-97cf-2cc851a883f8",
  "date_created": "2026-03-02T18:00:22.035000Z",
  "date_modified": "2026-03-02T18:00:22.035000Z",
  "file_hash": "aa408ff4d524c5bb0339b1e4132f8aa59b20bf4abfe590e4d1f7a90072f4ba1b",
  "private": false,
  "record": {
    "abstract": "We calculate photoexcitation amplitudes for several nucleon and delta\nresonances. We use a chiral quark model including two-body exchange currents.\nThe two-body currents give important contributions. For the delta (1232) and\nthe D13 (1520) we observe that the individual exchange current contributions\nconsiderably cancel each other while in the case of the Roper resonance and the\nS11 (1535) we get a reinforcement of the two-body amplitudes. In comparison\nwith present experimental data, we obtain both for the S11 (1535) and for the\nRoper resonance an improvement with respect to the impulse approximation.",
    "arxiv_id": "nucl-th/9801031",
    "authors": [
      "U. Meyer",
      "A. J. Buchmann",
      "Amand Faessler"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0370-2693(97)00840-X",
    "journal_ref": "Phys.Lett. B408 (1997) 19-24",
    "title": "Exchange Currents in Photoproduction of Baryon Resonances",
    "url": "https://arxiv.org/abs/nucl-th/9801031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c7d28bd9-aa40-48f3-ba3d-c572491531ee",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}