{
  "annotation_id": "20a166eb-316f-4315-8f4e-0d9b4f462670",
  "date_created": "2026-03-02T18:00:22.044000Z",
  "date_modified": "2026-03-02T18:00:22.044000Z",
  "file_hash": "f513dc33545800921608338c6649cb0f73ee7ffd7b9fa6ec8053356649823e9f",
  "private": false,
  "record": {
    "abstract": "The nuclear sigma term is calculated including the nuclear matrix element of\nthe derivative of the NN interaction with respect to the quark mass,\n$m_q\\frac{\\partial V_{NN}}{\\partial m_q}$. The NN potential is evaluated in the\nskyrmion-skyrmion picture within the quantized product ansatz. The contribution\nof the NN potential to the nuclear sigma term provides repulsion to the\npion-nucleus interaction. The strength of the s-wave pion-nucleus optical\npotential is estimated including such contribution. The results are consistent\nwith the analysis of the experimental data.",
    "arxiv_id": "nucl-th/9802085",
    "authors": [
      "A. Gammal",
      "T. Frederico"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.57.2830",
    "journal_ref": "Phys.Rev.C57:2830-2838,1998",
    "title": "The Nuclear Sigma Term in the Skyrme Model: Pion-Nucleus Interaction",
    "url": "https://arxiv.org/abs/nucl-th/9802085"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b048c439-dbbf-450e-9bc4-de0949cabe6c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}