{
  "annotation_id": "51e37c71-bf34-41b4-8b2d-ecbdbafae87d",
  "date_created": "2026-03-02T18:00:25.312000Z",
  "date_modified": "2026-03-02T18:00:25.312000Z",
  "file_hash": "01a488c6f23b5e747439b35725dbf8c4184db0eb777832cf2d2ae3f04ea75bea",
  "private": false,
  "record": {
    "abstract": "We discuss charge symmetry and charge independence breaking in an effective\nfield theory approach for few-nucleon systems. We systematically introduce\nstrong isospin-violating and electromagnetic operators in the theory. The\ncharge dependence observed in the nucleon-nucleon scattering lengths is due to\none-pion exchange and one electromagnetic four-nucleon contact term. This gives\na parameter free expression for the charge dependence of the corresponding\neffective ranges, which is in agreement with the rather small and uncertain\nempirical determinations. We also compare the low energy phase shifts of the\n$nn$ and the $np$ system.",
    "arxiv_id": "nucl-th/9902042",
    "authors": [
      "E. Epelbaum",
      "Ulf-G. Mei\u00dfner"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0370-2693(99)00776-5",
    "journal_ref": "Phys.Lett. B461 (1999) 287-294",
    "title": "Charge independence breaking and charge symmetry breaking in the   nucleon-nucleon interaction from effective field theory",
    "url": "https://arxiv.org/abs/nucl-th/9902042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3fe473df-a837-48c2-a369-575950cceafb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}