{
  "annotation_id": "c0c9b403-0405-4b1d-99ac-931d5024f615",
  "date_created": "2026-03-02T18:00:22.141000Z",
  "date_modified": "2026-03-02T18:00:22.141000Z",
  "file_hash": "f86ef3a1348b3882526ff5e4032048bb4d130267474b7d774c95a0c011a4afc5",
  "private": false,
  "record": {
    "abstract": "Superallowed $0^+ \\to 0^+$ nuclear beta decay provides a direct measure of\nthe weak vector coupling constant, $\\GV$. We survey current world data on the\nnine accurately determined transitions of this type, which range from the decay\nof $^{10}$C to that of $^{54}$Co, and demonstrate that the results confirm\nconservation of the weak vector current (CVC) but differ at the 98% confidence\nlevel from the unitarity condition for the Cabibbo-Kobayashi-Maskawa (CKM)\nmatrix. We examine the reliability of the small calculated corrections that\nhave been applied to the data, and assess the likelihood of even higher quality\nnuclear data becoming available to confirm or deny the discrepancy. Some of the\nrequired experiments depend upon the availability of intense radioactive beams.\nOthers are possible today.",
    "arxiv_id": "nucl-th/9807049",
    "authors": [
      "J. C. Hardy",
      "I. S. Towner"
    ],
    "categories": [
      "nucl-th",
      "hep-ph",
      "nucl-ex"
    ],
    "doi": "10.1063/1.57367",
    "title": "Superallowed Fermi beta decay",
    "url": "https://arxiv.org/abs/nucl-th/9807049"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "04f764ca-6660-49c9-8e6a-4e2c223e3fda",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}