{
  "annotation_id": "b214518f-c6b0-4fef-bfff-7f7998833f36",
  "date_created": "2026-03-02T18:00:22.097000Z",
  "date_modified": "2026-03-02T18:00:22.097000Z",
  "file_hash": "1c464bdb3d026d15eda3f0bc6fbf7b1f940f88d656433296b22d10c9991bae27",
  "private": false,
  "record": {
    "abstract": "The binding energies of the deeply bound 1s and 2p states in pionic atoms of\n$^{207}$Pb, recently established experimentally in the $^{208}$Pb(d,$^3$He)\nreaction, have been used by several groups to derive the pion effective mass in\nnuclear matter. We show that these binding energies are fully consistent with\n`normal\u0027 pionic atoms and that the real part of the pion-nucleus potential at\nthe center of $^{207}$Pb is 28$\\pm$3 MeV and not 20 MeV as suggested\npreviously.",
    "arxiv_id": "nucl-th/9805004",
    "authors": [
      "E. Friedman",
      "A. Gal"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0370-2693(98)00655-8",
    "journal_ref": "Phys.Lett. B432 (1998) 235-240",
    "title": "On the determination of the pion effective mass in nuclei from pionic   atoms",
    "url": "https://arxiv.org/abs/nucl-th/9805004"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c1e32dbd-1da5-4ffa-a7e1-339d90fa3387",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}