{
  "annotation_id": "68aca43e-b84a-4454-961a-e20a5c55612b",
  "date_created": "2026-03-02T18:00:32.074000Z",
  "date_modified": "2026-03-02T18:00:32.074000Z",
  "file_hash": "6b92b32f1864d78b85df09db1f9b4df39fd5d47e85cfef6138c609dc618b9563",
  "private": false,
  "record": {
    "abstract": "We present two new measurements constraining Lorentz and CPT violation using\nthe Xe-129 / He-3 Zeeman maser and atomic hydrogen masers. Experimental\ninvestigations of Lorentz and CPT symmetry provide important tests of the\nframework of the standard model of particle physics and theories of gravity.\nThe two-species Xe-129 / He-3 Zeeman maser bounds violations of CPT and Lorentz\nsymmetry of the neutron at the 10^-31 GeV level. Measurements with atomic\nhydrogen masers provide a clean limit of CPT and Lorentz symmetry violation of\nthe proton at the 10^-27 GeV level.",
    "arxiv_id": "physics/0007062",
    "authors": [
      "Ronald L. Walsworth",
      "David F. Phillips"
    ],
    "categories": [
      "physics.atom-ph",
      "hep-ex",
      "hep-ph",
      "physics.gen-ph"
    ],
    "title": "New Clock Comparison Tests of Lorentz Symmetry",
    "url": "https://arxiv.org/abs/physics/0007062"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9d1e2b20-397b-4f3d-9f17-347e1b1ccdf4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}