{
  "annotation_id": "284c663c-9bc8-4a36-ba74-ebc17f87ee83",
  "date_created": "2026-03-02T18:00:18.147000Z",
  "date_modified": "2026-03-02T18:00:18.147000Z",
  "file_hash": "8736572194414285830287a9bd7dfdbb57d0c05901ce4c0e3599591ad59c79e8",
  "private": false,
  "record": {
    "abstract": "The existing experimental evidence on the vector and axial-vector coupling\nconstants, $G_V$ and $G_A$, for neutron $\\beta$-decay exhibits two prominent\nproblems: (i) the unitarity for the first row of the CKM matrix seems violated;\n(ii) one obtains different values of $G_A/G_V$ according to whether one uses as\ninput the neutron lifetime or neutron-decay correlation observables. We show\nthat the in-medium modification of $G_A$ can influence both the inner and outer\nradiative corrections used in deducing $G_V$ from the super-allowed Fermi\ntransitions and that this effect may resolve the long-standing problems (i) and\n(ii) simultaneously.",
    "arxiv_id": "nucl-th/9706074",
    "authors": [
      "V. P. Gudkov",
      "K. Kubodera"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "title": "Possible solution to basic problems regarding the coupling constants   $G_V$ and $G_A$",
    "url": "https://arxiv.org/abs/nucl-th/9706074"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f397718c-1abe-482d-8b79-5a438cc2b509",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}