{
  "annotation_id": "19d51667-a785-489a-9740-6212580c846f",
  "date_created": "2026-03-02T18:00:14.917000Z",
  "date_modified": "2026-03-02T18:00:14.917000Z",
  "file_hash": "52a37a3bdd6693f440b3484fcb274a4ce9c7b3f8ebd7aed9c1677ea1b37d72d6",
  "private": false,
  "record": {
    "abstract": "Chiral effective lagrangians may differ in their prediction of meson-nucleon\nscattering amplitudes off-meson-mass-shell, but must yield identical S-matrix\nelements. We argue that the effective meson mass in nuclear matter obtained\nfrom chiral effective lagrangians is also unique. Off-mass-shell amplitudes\nobtained using the PCAC choice of pion field must therefore not be viewed as\nfundamental constraints on the dynamics, the determination of the effective\nmeson mass in nuclear matter or the possible existence of meson condensates in\nthe ground state of nuclear matter. This hypothesis is borne out by a\ncalculation of the effective mass in two commonly employed formulations of\nchiral perturbation theory which yield different meson-nucleon scattering\namplitudes off-meson-mass-shell.",
    "arxiv_id": "nucl-th/9502003",
    "authors": [
      "Vesteinn Thorsson",
      "Andreas Wirzba"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1016/0375-9474(95)00166-X",
    "journal_ref": "Nucl.Phys.A589:633-648,1995",
    "title": "S-wave Meson-Nucleon Interactions and the Meson Mass in Nuclear Matter   from Chiral Effective Lagrangians",
    "url": "https://arxiv.org/abs/nucl-th/9502003"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "396b8491-fa4e-4048-ae1b-476ec8796651",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}