{
  "annotation_id": "d8491361-c07f-4ce3-b9a3-56752f4ef974",
  "date_created": "2026-03-02T18:00:25.904000Z",
  "date_modified": "2026-03-02T18:00:25.904000Z",
  "file_hash": "4182d872f84d40e2437fd33dfda584e21568cc30ec9a4bde2083f93ea23ee590",
  "private": false,
  "record": {
    "abstract": "We present a few simple observations on the occurrence of $\\pi$-condensation\nin Nuclei, aimed at clarifying the nature of the $\\pi$-condensation implied by\nthe coherent nuclear $\\pi$-N-$\\Delta$ interaction, proposed in 1990 to explain\nthe puzzling emergence of the Shell-Model. We show that such condensation is\ntotally unrelated to the one proposed by A. B. Migdal at the beginning of \u002770,\nwhich can easily be shown not to occur at the normal nucleon density\n$\\rho_{N}\\simeq$ 0.17 fm${}^{-3}$.",
    "arxiv_id": "nucl-th/9903043",
    "authors": [
      "R. Alzetta",
      "G. Liberti",
      "G. Preparata"
    ],
    "categories": [
      "nucl-th"
    ],
    "journal_ref": "Nuovo Cim. A112 (1999) 1609-1613",
    "title": "A Few Simple Observations on Pion-Condensation in Nuclei",
    "url": "https://arxiv.org/abs/nucl-th/9903043"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d0ba481f-d16b-492f-b7a6-9c8d89929213",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}