{
  "annotation_id": "552556e1-dbbb-42be-b140-88a38b3176f2",
  "date_created": "2026-03-02T18:00:32.426000Z",
  "date_modified": "2026-03-02T18:00:32.426000Z",
  "file_hash": "b891e8432a7e06b0daf6143a31393259d1087c010a547479635994d785bf3d71",
  "private": false,
  "record": {
    "abstract": "We present a new measurement constraining Lorentz and CPT violation of the\nproton using a hydrogen maser double resonance technique. A search for hydrogen\nZeeman frequency variations with a period of the sidereal day (23.93 h) sets a\nclean limit on violation of Lorentz and CPT symmetry of the proton at the\n10^{-27} GeV level.",
    "arxiv_id": "physics/0008230",
    "authors": [
      "D. F. Phillips",
      "M. A. Humphrey",
      "E. M. Mattison",
      "R. E. Stoner",
      "R. F C. Vessot",
      "R. L. Walsworth"
    ],
    "categories": [
      "physics.atom-ph",
      "hep-ex",
      "hep-ph",
      "physics.gen-ph"
    ],
    "doi": "10.1103/PhysRevD.63.111101",
    "journal_ref": "Phys.Rev.D63:111101,2001",
    "title": "Limit on Lorentz and CPT Violation of the Proton Using a Hydrogen Maser",
    "url": "https://arxiv.org/abs/physics/0008230"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bf7e7019-6d01-47b4-992b-56d252066197",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}