{
  "annotation_id": "9875c87b-2c03-4e46-af2d-623eccd7846f",
  "date_created": "2026-03-02T18:00:04.612000Z",
  "date_modified": "2026-03-02T18:00:04.612000Z",
  "file_hash": "84fe8e18bce79b9576cb842113d513f4140a65f343e88bcd96968a1cd22f7aa3",
  "private": false,
  "record": {
    "abstract": "The $\\pi\\pi$ scattering amplitude in the $\\sigma$-channel is studied at\nfinite baryonic density in the framework of a chiral unitary approach which\nsuccessfully reproduces the meson meson phase shifts and generates the $f_0$\nand $\\sigma$ resonances in vacuum. We address here a new variety of mechanisms\nrecently suggested to modify the $\\pi\\pi$ interaction in the medium, as well as\nthe role of the $s-$wave selfenergy, in addition to the $p-$wave, in the\ndressing of the pion propagators.",
    "arxiv_id": "nucl-th/0503014",
    "authors": [
      "D. Cabrera",
      "E. Oset",
      "M. J. Vicente Vacas"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.72.025207",
    "journal_ref": "Phys.Rev.C72:025207,2005",
    "title": "Evaluation of the $\\pi\\pi$ scattering amplitude in the $\\sigma$-channel   at finite density",
    "url": "https://arxiv.org/abs/nucl-th/0503014"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "211f8448-ecc7-45be-a29f-6c494f01ab64",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}