{
  "annotation_id": "3d5efb3a-68a9-4fdf-b831-35c278e48805",
  "date_created": "2026-03-02T18:00:04.340000Z",
  "date_modified": "2026-03-02T18:00:04.340000Z",
  "file_hash": "2b8d4c6c44f5604559b6b12ce09eda49e8fd6fed54e2a5f308d62e0ada21069b",
  "private": false,
  "record": {
    "abstract": "We calculate the effects on the elastic electron-proton scattering cross\nsection of the two-photon exchange contribution with an intermediate $\\Delta$\nresonance. The $\\Delta$ two-photon exchange contribution is found to be smaller\nin magnitude than the previously evaluated nucleon contribution, with an\nopposite sign at backward scattering angles. The sum of the nucleon and\n$\\Delta$ two-photon exchange corrections has an angular dependence compatible\nwith both the polarisation transfer and the Rosenbluth methods of measuring the\nnucleon electromagnetic form factors.",
    "arxiv_id": "nucl-th/0506026",
    "authors": [
      "S. Kondratyuk",
      "P. G. Blunden",
      "W. Melnitchouk",
      "J. A. Tjon"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevLett.95.172503",
    "journal_ref": "Phys.Rev.Lett.95:172503,2005",
    "title": "$\\Delta$ resonance contribution to two-photon exchange in   electron-proton scattering",
    "url": "https://arxiv.org/abs/nucl-th/0506026"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c2d40bd6-2eab-4437-93c6-32783a855a9d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}