{
  "annotation_id": "70b34d9c-18a2-439c-af5a-b57ca91e0b8e",
  "date_created": "2026-03-02T17:59:56.792000Z",
  "date_modified": "2026-03-02T17:59:56.792000Z",
  "file_hash": "8b8b6f27937f8dc48a5fc2d331fdb36384f0674dbf7fb0892dcf05a2ebc17b86",
  "private": false,
  "record": {
    "abstract": "We re-investigate Adler\u0027s PCAC relation in the presence of an external\nelectromagnetic field within the framework of QCD coupled to external fields.\nWe discuss pion electroproduction within a tree-level approximation to chiral\nperturbation theory and explicitly verify a chiral Ward identity referred to as\nthe Adler-Gilman relation. We critically examine soft-momentum techniques and\npoint out how inadmissable approximations may lead to results incompatible with\nchiral symmetry. As a result we confirm that threshold pion electroproduction\nis indeed a tool to obtain information on the axial form factor of the nucleon.",
    "arxiv_id": "nucl-th/0303002",
    "authors": [
      "T. Fuchs",
      "S. Scherer"
    ],
    "categories": [
      "nucl-th",
      "hep-ph",
      "nucl-ex"
    ],
    "doi": "10.1103/PhysRevC.68.055501",
    "journal_ref": "Phys.Rev. C68 (2003) 055501",
    "title": "Pion electroproduction, PCAC, chiral Ward identities, and the axial form   factor revisited",
    "url": "https://arxiv.org/abs/nucl-th/0303002"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2952f8b4-80d0-4c06-abf0-53a210b9d483",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}