{
  "annotation_id": "3ccf43b4-fdd3-420f-8659-7c3338057841",
  "date_created": "2026-03-02T18:00:32.013000Z",
  "date_modified": "2026-03-02T18:00:32.013000Z",
  "file_hash": "df2068bceccec20c87a82e8dfe88f61ad7cd31f4366dbe4fabb3babef28fcd24",
  "private": false,
  "record": {
    "abstract": "We have performed relativistic many-body calculations of the hyperfine\ninteraction in the $6s$ and $7s$ states of Cs, including the off-diagonal\nmatrix element. The calculations were used to determine the accuracy of the\nsemi-empirical formula for the electromagnetic transition amplitude\n$\u003c6s|M1|7s\u003e$ induced by the hyperfine interaction. We have found that even\nthough the contribution of the many-body effects into the matrix elements is\nvery large, the square root formula $\u003c6s|H_{hfs}|7s \u003e = \\sqrt{\u003c 6s|H_{hfs}|6s \u003e\n\u003c 7s|H_{hfs}|7s \u003e}$ remains valid to the accuracy of a fraction of $10^{-3}$.\nThe result for the M1-amplitude is used in the interpretation of the\nparity-violation measurement in the $6s-7s$ transition in Cs which claims a\npossible deviation from the Standard model.",
    "arxiv_id": "physics/0005038",
    "authors": [
      "V. A. Dzuba",
      "V. V. Flambaum"
    ],
    "categories": [
      "physics.atom-ph",
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevA.62.052101",
    "journal_ref": "Phys.Rev.A62:052101,2000",
    "title": "Off-Diagonal Hyperfine Interaction and Parity Non-conservation in Cesium",
    "url": "https://arxiv.org/abs/physics/0005038"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b429dc12-fb4f-463f-af7a-38f2b1ff7b55",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}