{
  "annotation_id": "ccc89972-71d4-462c-b8de-bbaf3d674bad",
  "date_created": "2026-03-02T18:00:04.003000Z",
  "date_modified": "2026-03-02T18:00:04.003000Z",
  "file_hash": "058f78bfd8352288698f5ae7d5eba660536e7a9749c68dbde204863d884bfa0a",
  "private": false,
  "record": {
    "abstract": "Polarization observables for the reaction $\\bar p+p\\to e^++e^-$ are given in\nterms of three independent complex amplitudes, in presence of two photon\nexchange. General expressions for the differential cross section and the\npolarization observables are given and model independent properties are\nderived. Polarization effects depending on the polarization of the antiproton\nbeam, the target and of the electron in the final state, have been calculated.",
    "arxiv_id": "nucl-th/0504021",
    "authors": [
      "G. I. Gakh",
      "E. Tomasi--Gustafsson"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/j.nuclphysa.2005.07.002",
    "journal_ref": "Nucl.Phys. A761 (2005) 120-131",
    "title": "Polarization effects in the reaction $\\bar p+p\\to e^++e^-$ in presence   of two-photon exchange",
    "url": "https://arxiv.org/abs/nucl-th/0504021"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8802dc2f-c3bc-474e-9b00-c23dec2a1153",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}