{
  "annotation_id": "06d7b571-cf91-48ae-a47f-1c67bf9ed8f5",
  "date_created": "2026-03-02T18:00:18.800000Z",
  "date_modified": "2026-03-02T18:00:18.800000Z",
  "file_hash": "239bb81d36ae815a38dbf1779aff22babaa661f9c1848a95f4ee377fa1202b39",
  "private": false,
  "record": {
    "abstract": "Photoproduction of $e^+e^-$ pairs at small angles is investigated as a tool\nto determine the functions $f_1$ and $f_2$ entering the real-photon forward\nCompton scattering amplitude. The method is based on an interference of the\nBethe-Heitler and the virtual Compton scattering mechanisms, generating an\nazimuthal asymmetry in the $e^+$ versus $e^-$ yield. The general case of a\ncircularly polarized beam and a longitudinally polarized target allows one to\ndetermine both the real and imaginary parts of $f_1$ as well as $f_2$. The\nimaginary part of $f_2$ requires target polarization only. We calculate cross\nsections and asymmetries of the reaction $p(\\gamma,e^+e^-)p$, estimate\ncorrections and backgrounds, and propose suitable kinematical regions to\nperform the experiment. Our investigation shows that photoproduction of\n$e^+e^-$-pairs off the proton and light nuclei may serve as a rather sensitive\ntest of the validity of the Gerasimov-Drell-Hearn sum rule.",
    "arxiv_id": "nucl-th/9707006",
    "authors": [
      "A. I. L\u0027vov",
      "S. Scopetta",
      "D. Drechsel",
      "S. Scherer"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.57.312",
    "journal_ref": "Phys.Rev.C57:312-321,1998",
    "title": "Polarization Phenomena in Small-Angle Photoproduction of e+e- Pairs and   the Gerasimov-Drell-Hearn Sum Rule",
    "url": "https://arxiv.org/abs/nucl-th/9707006"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "14c2c9c9-4c2f-4102-b2f1-476e96ce77dc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}