{
  "annotation_id": "81fcc1e9-8929-4ee6-8520-afe6069f175f",
  "date_created": "2026-02-17T05:53:08.155000Z",
  "date_modified": "2026-02-17T05:53:08.155000Z",
  "file_hash": "c6f18b5955cc951068f92ef1145cfec8846b30ed32c2c3245d7c8a89dd760727",
  "private": false,
  "record": {
    "abstract": "The Nambu-Jona-Lasinio model is used to calculate the branching fractions of two-lepton decays $\\eta^{(\\prime)}\\to\\pi^+\\pi^-l^+l^-$, where $l=e,\\mu$. Particular attention is paid to the study of the contribution of the diagram with the exchange of two vector mesons. It is shown that taking this contribution into account is essential for the agreement between theoretical calculations and available experimental data.",
    "arxiv_id": "2601.06958",
    "authors": [
      "M. K. Volkov",
      "A. A. Osipov",
      "K. Nurlan",
      "A. A. Pivovarov"
    ],
    "categories": [
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "$\\eta^{(\\prime)}\\to\\pi^+\\pi^-l^+l^-$ decays in the NJL model",
    "url": "https://arxiv.org/abs/2601.06958",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2ff2373d-4751-441e-a71c-dbc60f41a4fd",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}