{
  "annotation_id": "36c79641-efde-499f-af9d-6b019db0d99f",
  "date_created": "2026-03-02T18:00:19.118000Z",
  "date_modified": "2026-03-02T18:00:19.118000Z",
  "file_hash": "90f88db98689e2d8dbed9fcd4aff8b48985762f1f6352b4ccb90bf18247e6149",
  "private": false,
  "record": {
    "abstract": "We study the effect of the chiral phase transition on pion production in hot\nhadronic matter. The phase of restored chiral symmetry is characterized by the\nappearance of the scalar $\\sigma$-meson as a chiral partner of the pion as well\nas by the degeneracy of the vector and axial-vector mesons. We find rapid\nthermal and chemical equilibration of these degrees of freedom in the symmetric\nphase. Provided that the chiral transition temperature is not considerably\nhigh, the presence of a chirally symmetric phase will result in $\\sim 1.6$\ntimes more thermal pions in the final state.",
    "arxiv_id": "nucl-th/9703010",
    "authors": [
      "Chungsik Song",
      "Volker Koch"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1016/S0370-2693(97)00575-3",
    "journal_ref": "Phys.Lett. B404 (1997) 1-7",
    "title": "Excess of pions with chiral symmetry restoration",
    "url": "https://arxiv.org/abs/nucl-th/9703010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ae0679dd-7a1b-4216-ab07-6508310119a4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}