{
  "annotation_id": "70bdaad2-f913-4941-8d05-8d6407180326",
  "date_created": "2026-03-02T18:00:01.307000Z",
  "date_modified": "2026-03-02T18:00:01.307000Z",
  "file_hash": "16a5c4be8bf7f5aa14c047a96b1f3ed4c0d80c8bf3ab4f322935b65d5fcbf876",
  "private": false,
  "record": {
    "abstract": "A new method is developed for treating the effect of the neutron-proton mass\ndifference in isospin-violating nuclear forces. Previous treatments utilized an\nawkward subtraction scheme to generate these forces. A field redefinition is\nused to remove that mass difference from the Lagrangian (and hence from\nasymptotic nucleon states) and replace its effect by effective interactions.\nPrevious calculations of static Class II charge-independence-breaking and Class\nIII charge-symmetry-breaking potentials are verified using the new scheme,\nwhich is also used to calculate Class IV nuclear forces. Two-body forces of the\nlatter type are found to be identical to previously obtained results. A novel\nthree-body force is also found. Problems involving Galilean invariance with\nClass IV one-pion-exchange forces are identified and resolved.",
    "arxiv_id": "nucl-th/0406026",
    "authors": [
      "J. L. Friar",
      "U. van Kolck",
      "M. C. M. Rentmeester",
      "R. G. E. Timmermans"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.70.044001",
    "journal_ref": "Phys.Rev.C70:044001,2004",
    "title": "The Nucleon-Mass Difference in Chiral Perturbation Theory and Nuclear   Forces",
    "url": "https://arxiv.org/abs/nucl-th/0406026"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "813b9a16-3be5-4324-8530-5b8338f778bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}