{
  "annotation_id": "858c8b28-5616-4b4e-aa89-02c81f4ff0d1",
  "date_created": "2026-03-02T18:00:21.963000Z",
  "date_modified": "2026-03-02T18:00:21.963000Z",
  "file_hash": "6be0f43be083f2669a907a28db9c7e5aab4756a6ef7cfbf5d380220403329d6c",
  "private": false,
  "record": {
    "abstract": "We evaluate the nucleon sigma term and in-medium quark condensate in the\nmodified quark-meson coupling model which features a density-dependent bag\nconstant. We obtain a nucleon sigma term consistent with its empirical value,\nwhich requires a significant reduction of the bag constant in the nuclear\nmedium similar to those found in the previous works. The resulting in-medium\nquark condensate at low densities agrees well with the model independent linear\norder result. At higher densities, the magnitude of the in-medium quark\ncondensate tends to increase, indicating no tendency toward chiral symmetry\nrestoration.",
    "arxiv_id": "nucl-th/9709074",
    "authors": [
      "Xuemin Jin",
      "Manuel Malheiro"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1142/S021773239900033X",
    "journal_ref": "Mod.Phys.Lett. A14 (1999) 289-298",
    "title": "Nucleon Sigma Term and In-medium Quark Condensate in the Modified   Quark-Meson Coupling Model",
    "url": "https://arxiv.org/abs/nucl-th/9709074"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "63a4c7c0-f6e9-49e0-8e17-fccc4ab1d6a6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}