{
  "annotation_id": "944d914a-e736-4d61-9446-aaaf275a331a",
  "date_created": "2026-03-02T18:00:22.105000Z",
  "date_modified": "2026-03-02T18:00:22.105000Z",
  "file_hash": "2b50140e0aa5a9b2c079e39c03a9cfd35fc1169b907d49a0cc0171d0a33d96d4",
  "private": false,
  "record": {
    "abstract": "We investigate the possibility of measuring the pion dispersion relation in\nnuclear matter through the anomalous coupling in the reaction \\gamma - \\gamma\u0027\n\\pi_0. It is shown that this reaction permits the study of pionic modes for\nspace-like momenta. If the pion is softened in nuclear matter due to mixing\nwith the delta-hole state, significant strength for this reaction is expected\nto move into the space-like region. Competing background processes are\nevaluated, and it is concluded that useful insight can be obtained\nexperimentally, but only through a difficult exclusive measurement.",
    "arxiv_id": "nucl-th/9806040",
    "authors": [
      "Alexander Volya",
      "Kevin Haglin",
      "Scott Pratt",
      "Vladimir Dmitriev"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1088/0954-3899/25/10/305",
    "journal_ref": "J.Phys.G25:2049-2058,1999",
    "title": "Exploring the nuclear pion dispersion relation through the anomalous   coupling of photon to photon and neutral pion",
    "url": "https://arxiv.org/abs/nucl-th/9806040"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "12f9b5b6-003e-497a-bf34-692bbe44c17b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}