{
  "annotation_id": "08b4de1f-8111-47fa-8fdb-5938408ade3f",
  "date_created": "2026-03-02T18:00:01.310000Z",
  "date_modified": "2026-03-02T18:00:01.310000Z",
  "file_hash": "bd4c40e5299756444ea5b79a5bd2c4253ec6f160b1809c94822c2718526dd27f",
  "private": false,
  "record": {
    "abstract": "We study the two-pion propagator in the nuclear medium. This quantity appears\nin the $\\pi-\\pi$ T-matrix and we show that it also enters the QCD scalar\nsusceptibility. The medium effects on this propagator are due to the influence\nof the individual nucleon response to a scalar field through their pion clouds.\nThis response is appreciably increased by the nuclear environment. It produces\nan important convergence effect between the scalar and pseudoscalar\nsusceptibilities, reflecting the reshaping of the scalar strengh observed in\n$2\\pi$ production experiments. While a large modification of the $\\sigma$\npropagator follows, due to its coupling to two pion states, we show that the NN\npotential remains instead unaffected.",
    "arxiv_id": "nucl-th/0406003",
    "authors": [
      "G. Chanfray",
      "D. Davesne",
      "M. Ericson",
      "M. Martini"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1140/epja/i2005-10245-5",
    "journal_ref": "Eur.Phys.J. A27 (2006) 191-198",
    "title": "Two-pion production processes, chiral symmetry and NN interaction in the   medium",
    "url": "https://arxiv.org/abs/nucl-th/0406003"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "31ed9f95-9a37-409c-98ae-ed5a04a74390",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}