{
  "annotation_id": "2154805c-6a41-4466-98a8-0d4f719e15ae",
  "date_created": "2026-03-02T18:01:07.467000Z",
  "date_modified": "2026-03-02T18:01:07.467000Z",
  "file_hash": "a973445ad61df228488cdcaab3109be8386178555badc11ee7e6976cf75040a3",
  "private": false,
  "record": {
    "abstract": "Improved theoretical predictions for the fine-structure splitting of $2^3P_J$\nlevels in helium are obtained by the calculation of contributions of order\n$\\alpha^5 Ry$. New results for transition frequencies, $\\nu_{01} = 29 616\n943.01(17)$ kHz and $\\nu_{12} = 2 291 161.13(30)$ kHz disagree significantly\nwith the experimental values, indicating an outstanding problem in bound state\nQED.",
    "arxiv_id": "physics/0603090",
    "authors": [
      "Krzysztof Pachucki"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.97.013002",
    "journal_ref": "Phys. Rev. Lett. 97, 13002 (2006)",
    "title": "Improved theory of helium fine structure",
    "url": "https://arxiv.org/abs/physics/0603090"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "304b6c46-076c-452b-825b-c80746ad5205",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}