{
  "annotation_id": "2fef4c80-f906-4d46-a52d-ffb51c36270c",
  "date_created": "2026-03-02T18:00:31.614000Z",
  "date_modified": "2026-03-02T18:00:31.614000Z",
  "file_hash": "04253d32b6f28362044df3c970692cc0618b87aa61cee95835a2d166ef9d9e65",
  "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/0007063",
    "authors": [
      "Ronald L. Walsworth",
      "David Bear",
      "Marc Humphrey",
      "Edward M. Mattison",
      "David F. Phillips",
      "Richard E. Stoner",
      "Robert F. C. Vessot"
    ],
    "categories": [
      "physics.atom-ph",
      "hep-ex",
      "hep-ph",
      "physics.gen-ph"
    ],
    "doi": "10.1063/1.1330910",
    "journal_ref": "AIP Conf.Proc.539:119-129,2000",
    "title": "New Clock Comparison Searches for Lorentz and CPT Violation",
    "url": "https://arxiv.org/abs/physics/0007063"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "803e0f4f-55a9-43b9-9542-ca483fafcd48",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}