{
  "annotation_id": "87145aa5-d7e3-4310-989b-cfec3a4f935b",
  "date_created": "2026-03-02T18:00:22.301000Z",
  "date_modified": "2026-03-02T18:00:22.301000Z",
  "file_hash": "8b795ff2edc75ecd4093dd6b1825deb3f30d56a2e76ff9328a898e9450fa9ac3",
  "private": false,
  "record": {
    "abstract": "A set of 13 linearly independent invariant amplitudes for the electromagnetic\nproduction of a pseudoscalar particle from a spin-one particle is derived which\nrespect Lorentz and gauge invariance. The $T$-matrix can be represented by a\nlinear superposition of these amplitudes with invariant functions as\ncoefficients, which depend on the Mandelstam variables only. Their explicit\nform is determined by the underlying dynamics. Nine of these amplitudes are\npurely transverse and describe photoproduction. The remaining four appear in\nelectroproduction in addition, describing charge and longitudinal current\ncontributions. Furthermore, a reduction of these amplitudes to operators acting\nin non-relativistic spin space is given.",
    "arxiv_id": "nucl-th/9809067",
    "authors": [
      "Hartmuth Arenhoevel"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1007/s006010050100",
    "journal_ref": "Few Body Syst. 25 (1998) 157-175",
    "title": "Invariant amplitudes for coherent electromagnetic pseudoscalar   production from a spin-one target",
    "url": "https://arxiv.org/abs/nucl-th/9809067"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9b61d7ec-f775-45cf-ad46-9e74760e9def",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}