{
  "annotation_id": "6606c5d5-18e9-49d7-b58b-70f5204de33a",
  "date_created": "2026-03-02T18:00:25.835000Z",
  "date_modified": "2026-03-02T18:00:25.835000Z",
  "file_hash": "9aa74c988419bf0cdbb0d45e74e8cf0f504ef6f2a4931bd4dcafd6ad48822d19",
  "private": false,
  "record": {
    "abstract": "The formal properties of the recently derived set of linearly independent\ninvariant amplitudes for the electromagnetic production of a pseudoscalar\nparticle from a spin-one particle have been further exploited. The crossing\nproperties are discussed in detail. Since not all of the amplitudes have simple\ncrossing behaviour, we introduce an alternative set of basic amplitudes which\nare either symmetric or antisymmetric under crossing. The multipole\ndecomposition is given, and the representation of the multipoles as integrals\nover the invariant functions weighted with Legendre polynomials is derived.\nFurthermore, differential cross section and polarization observables are\nexpressed in terms of the corresponding invariant functions.",
    "arxiv_id": "nucl-th/9907005",
    "authors": [
      "Hartmuth Arenhoevel"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1007/s006010050127",
    "journal_ref": "Few Body Syst. 27 (1999) 141-162",
    "title": "Invariant amplitudes for coherent electromagnetic pseudoscalar   production from a spin-one target (II): crossing, multipoles and observables",
    "url": "https://arxiv.org/abs/nucl-th/9907005"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6f8be2e8-3be1-4c48-85b0-9cc149211577",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}