{
  "annotation_id": "1a43ed32-24ea-43b7-9247-01b16d955c14",
  "date_created": "2026-03-02T18:00:15.206000Z",
  "date_modified": "2026-03-02T18:00:15.206000Z",
  "file_hash": "8b88cdd76e5215ebea8737399e73587aacb777c2165d41fb5904f1eab378242a",
  "private": false,
  "record": {
    "abstract": "We consider the chiral expansion of the threshold amplitude for the reaction\n$\\gamma p \\to \\pi^0 \\pi^0 p$ to order ${\\cal O}(M_\\pi^2)$. We substantiate a\nclaim that this photoproduction channel is significantly enhanced close to\nthreshold due to pion loops. A precise measurement of the corresponding cross\nsections is called for which allows to test chiral perturbation theory.",
    "arxiv_id": "nucl-th/9604010",
    "authors": [
      "V. Bernard",
      "N. Kaiser",
      "Ulf-G. Mei\u00dfner"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1016/0370-2693(96)00646-6",
    "journal_ref": "Phys.Lett. B382 (1996) 19-23",
    "title": "Double neutral pion photoproduction at threshold",
    "url": "https://arxiv.org/abs/nucl-th/9604010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f5e7ea46-e408-4e45-9b1f-7298ed97cd76",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}