{
  "annotation_id": "f90e582e-405f-4cfc-b37a-f351e479f937",
  "date_created": "2026-03-02T18:00:15.360000Z",
  "date_modified": "2026-03-02T18:00:15.360000Z",
  "file_hash": "7fb6fe1631a42e0f4366d1ee845ae68e3b5a36d0ece1928e1cbc7db130730fa9",
  "private": false,
  "record": {
    "abstract": "The s-wave correlated $\\pi$-$\\pi$ strength distribution in cold nuclear\nmatter is investigated. The in-medium single pions are renormalized by means of\nthe usual p-wave couplings to nucleons and $\\Delta$\u0027s. Two groups of models for\nthe $\\pi$-$\\pi$ interaction are studied. The first one uses phenomenological\nmodels which reproduce the phase shifts but do not respect the soft-pion\ntheorems. With increasing density a strong accumulation of strength in the\nsubhreshold region is observed. Slightly above saturation density there even\noccurs an instability with respect to s-wave $\\pi$-$\\pi$ pair condensation.\nThese effects are strongly moderated or disappear altogether if constraints\nfrom chiral symmetry are built into the $\\pi$-$\\pi$ interaction.",
    "arxiv_id": "nucl-th/9406010",
    "authors": [
      "Z. Aouissat",
      "R. Rapp",
      "G. Chanfray",
      "P. Schuck",
      "J. Wambach"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/0375-9474(94)00429-Q",
    "journal_ref": "Nucl.Phys.A581:471-492,1995",
    "title": "S-Wave Pion-Pion Correlations in Dense Nuclear Matter",
    "url": "https://arxiv.org/abs/nucl-th/9406010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2604a53a-4320-4ce3-8ba3-e0eb38ae5ff3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}