{
  "annotation_id": "18c945e0-6731-4dbe-aa7a-112a844cdef2",
  "date_created": "2026-03-02T18:00:18.661000Z",
  "date_modified": "2026-03-02T18:00:18.661000Z",
  "file_hash": "3a6129ee7292f65625633eab9ca5a24238918f745c7e4a0fe8cbe076655b260c",
  "private": false,
  "record": {
    "abstract": "Several methods for the treatment of pion photoproduction in the region of\nthe Delta(1232) resonance are discussed, in particular the effective Lagrangian\napproach and the speed plot analysis are compared to a dynamical treatment. As\na main topic, we discuss the extraction of the genuine resonance parts of the\nmagnetic dipole and electric quadrupole multipoles of the electromagnetic\nexcitation of the resonance. To this end, we try to relate the various values\nfor the ratio R_{EM} of the E2 to M1 multipole excitation strengths for the\nDelta(1232) resonance as extracted by the different methods to corresponding\nratios of a dynamical model. Moreover, it is confirmed that all methods for\nextracting resonance properties suffer from an unitary ambiguity which is due\nto some phenomenological contributions entering the models.",
    "arxiv_id": "nucl-th/9708005",
    "authors": [
      "Th. Wilbois",
      "P. Wilhelm",
      "H. Arenhoevel"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.57.295",
    "journal_ref": "Phys.Rev.C57:295-304,1998",
    "title": "On the extraction of electromagnetic properties of the Delta(1232)   excitation from pion photoproduction",
    "url": "https://arxiv.org/abs/nucl-th/9708005"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "671303b7-d6e9-4029-9ebc-221cc9bb1bf0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}