{
  "annotation_id": "68a2120e-439b-479f-b308-b54ce96913ea",
  "date_created": "2026-03-02T18:00:01.533000Z",
  "date_modified": "2026-03-02T18:00:01.533000Z",
  "file_hash": "237de691ae280938b561098a8780e462b0dacaf7ccc62b172920dd282d3c40e9",
  "private": false,
  "record": {
    "abstract": "We study the modification of hadron masses due to the vacuum polarization\nusing the chiral sigma model, which is extended to generate the $\\omega$ meson\nmass by the sigma condensation in the vacuum in the same way as the nucleon\nmass. The results obtained in the chiral sigma model are compared with those\nobtained in the Walecka model which includes $\\sigma$ and $\\omega$ mesons in a\nnon-chiral fashion. It is shown that both the nucleon mass and the $\\omega$\nmeson mass decrease in nuclear medium, while the $\\sigma$ meson mass increases\nat finite density in the chiral sigma model.",
    "arxiv_id": "nucl-th/0409057",
    "authors": [
      "H. Shen",
      "S. Tamenaga",
      "H. Toki"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/j.nuclphysa.2004.09.006",
    "journal_ref": "Nucl.Phys. A745 (2004) 121-128",
    "title": "Variation of hadron masses in nuclear matter in the relativistic Hartree   approximation",
    "url": "https://arxiv.org/abs/nucl-th/0409057"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "48c184ec-3c15-4651-80a8-efb0da248bad",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}