{
  "annotation_id": "b952cdb0-bc6b-403e-8122-791188409758",
  "date_created": "2026-03-02T18:00:11.868000Z",
  "date_modified": "2026-03-02T18:00:11.868000Z",
  "file_hash": "9914fddea212034382b3a3f951b55439633a2515c911a5186dfe3e03a5e92930",
  "private": false,
  "record": {
    "abstract": "We present an exploratory study of two pion photo-- and electroproduction off\nthe nucleon in the threshold region. To calculate the pertinent amplitudes, we\nmake use of heavy baryon chiral perturbation theory. We show that due to finite\nchiral loops the production cross section for final states with two neutral\npions is considerably enhanced. The experimental implications are briefly\ndiscussed.",
    "arxiv_id": "nucl-th/9403013",
    "authors": [
      "V. Bernard",
      "N. Kaiser",
      "Ulf-G. Mei\u00dfner",
      "A. Schmidt"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1016/0375-9474(94)90910-5",
    "journal_ref": "Nucl.Phys. A580 (1994) 475-499",
    "title": "Threshold Two-Pion Photo- and Electroproduction: More neutrals than   expected",
    "url": "https://arxiv.org/abs/nucl-th/9403013"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2aa80c10-1866-47fc-9461-628c4f1a6c16",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}