{
  "annotation_id": "d454568a-8f7a-4aa4-8e9d-9f361be81269",
  "date_created": "2026-03-02T18:00:03.934000Z",
  "date_modified": "2026-03-02T18:00:03.934000Z",
  "file_hash": "8e9b900ba476cc3d86e5e8cae11ed34b07cf962c4e9ee0c9aadf8d270aab42bc",
  "private": false,
  "record": {
    "abstract": "We use the framework of effective field theories to discuss the determination\nof the S-wave \\pi N scattering lengths from the recent high-precision\nmeasurements of pionic deuterium observables. The theoretical analysis proceeds\nin several steps. Initially, the precise value of the pion-deuteron scattering\nlength a_{\\pi d} is extracted from the data. Next, a_{\\pi d} is related to the\nS-wave \\pi N scattering lengths a_+ and a_-. We discuss the use of this\ninformation for constraining the values of these scattering lengths in the full\nanalysis, which also includes the input from the pionic hydrogen energy shift\nand width measurements, and throughly investigate the accuracy limits for this\nprocedure. In this paper, we also give a detailed comparison to other effective\nfield theory approaches, as well as with the earlier work on the subject,\ncarried out within the potential model and multiple scattering framework.",
    "arxiv_id": "nucl-th/0501073",
    "authors": [
      "Ulf-G. Mei\u00dfner",
      "Udit Raha",
      "Akaki Rusetsky"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1140/epjc/s2005-02182-4 10.1140/epjc/s2005-02444-1",
    "journal_ref": "Eur.Phys.J.C41:213-232,2005; Erratum-ibid.C45:545,2006",
    "title": "The pion-nucleon scattering lengths from pionic deuterium",
    "url": "https://arxiv.org/abs/nucl-th/0501073"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b3a94713-82c5-4ffc-b904-fd69e93362f3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}