{
  "annotation_id": "3b0a5806-2ad3-4dba-9cf1-fafb1fda8b1f",
  "date_created": "2026-03-02T18:00:04.962000Z",
  "date_modified": "2026-03-02T18:00:04.962000Z",
  "file_hash": "6a286d158aec4dd12a8479c65f5e2b9ed38623a5e1b588880edf0eef807e28cb",
  "private": false,
  "record": {
    "abstract": "Photoproduction of two pions on nucleon and deuteron is studied for photon\nenergies from threshold up to $E_\\gamma = 1.5$ GeV. For the elementary operator\nan effective Lagrangean approach is used with resonance and Born contributions.\nThe model parameters are fixed by resonance decay widths and multipole analyses\nof single pion photoproduction. A satisfactory description of total cross\nsections of two-pion production on the proton for various charge channels is\nachieved, except for $\\pi^0\\pi^0$ production for which a significant\nunderestimation is found near threshold. The operator then serves for the\nevaluation of this reaction on the deuteron in the impulse approximation. In\naddition, $NN$ rescattering in the final state is taken into account, but $\\pi\nN$ and $\\pi\\pi$ rescatterings are neglected. Results are presented for total\ncross sections and target asymmetries.",
    "arxiv_id": "nucl-th/0503042",
    "authors": [
      "A. Fix",
      "H. Arenhoevel"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1140/epja/i2005-10067-5",
    "journal_ref": "Eur.Phys.J. A25 (2005) 115-135",
    "title": "Double pion photoproduction on nucleon and deuteron",
    "url": "https://arxiv.org/abs/nucl-th/0503042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1fceedb0-172c-429f-a2f4-bf9304e0e012",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}