{
  "annotation_id": "381d7213-b123-4dbe-b0e4-336936dad127",
  "date_created": "2026-03-02T18:00:01.477000Z",
  "date_modified": "2026-03-02T18:00:01.477000Z",
  "file_hash": "1d76527b52e2b282c5d8b817f0c93c9923b17c5d4cbf877ac57b26a118cee8e5",
  "private": false,
  "record": {
    "abstract": "The isoscalar and isovector scattering lengths (b_0,b_1) are determined using\na unitarized coupled channel approach based on chiral Lagrangians. Using\nexperimental values of pionic hydrogen and deuterium as well as low energy pi N\nscattering data, the free parameters of the model are calculated. Isospin\nviolation is incorporated to a certain extent by working with physical particle\nmasses. For the deuterium scattering length a_{pi-d} new significant\ncorrections concerning real and imaginary parts are evaluated, putting new\nconstraints from pi-d scattering on the values of (b_0,b_1). In particular,\ndispersion corrections, the influence of the Delta(1232) resonance, crossed\nterms and multiple scattering in a Faddeev approach are considered.",
    "arxiv_id": "nucl-th/0402086",
    "authors": [
      "M. Doring",
      "E. Oset",
      "M. J. Vicente Vacas"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.70.045203",
    "journal_ref": "Phys.Rev.C70:045203,2004",
    "title": "S-wave pion nucleon scattering lengths from $\\pi N$, pionic hydrogen and   deuteron data",
    "url": "https://arxiv.org/abs/nucl-th/0402086"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "87dfc095-e623-45cb-9b9f-8167d92321c5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}