{
  "annotation_id": "a713f39f-21d3-4008-8620-93dc3c48d8c3",
  "date_created": "2026-03-02T18:01:11.105000Z",
  "date_modified": "2026-03-02T18:01:11.105000Z",
  "file_hash": "1c9c973dd36cb68073270debee24dbac2fb453c101fa09ad84edafe89f137394",
  "private": false,
  "record": {
    "abstract": "Corrections of order $\\alpha^4$Ry are calculated for the singlet states\n$1^1S_0$ and $2^1S_0$ of the helium atom. The result for $1^1S_0$ state is in\nslight disagreement with that of Korobov and Yelkhovsky in [Phys. Rev. Lett.\n{\\bf 87}, 193003 (2001)]. The results obtained lead to a significant\nimprovement of transition frequencies between low lying levels of the helium\natom. In particular theoretical predictions for the $2^1S_0 - 1^1S_0$\ntransition are found to be in disagreement with experimental values.",
    "arxiv_id": "physics/0607070",
    "authors": [
      "Krzysztof Pachucki"
    ],
    "categories": [
      "physics.atom-ph",
      "physics.gen-ph"
    ],
    "doi": "10.1103/PhysRevA.74.022512",
    "title": "$\\alpha^4$ Ry corrections to singlet states of helium",
    "url": "https://arxiv.org/abs/physics/0607070"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e8ed20ad-b923-4edf-b4dd-19074d38b886",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}