{
  "annotation_id": "4271fcc0-42e3-4d04-aa0d-b19777b306ef",
  "date_created": "2026-03-02T18:00:42.793000Z",
  "date_modified": "2026-03-02T18:00:42.793000Z",
  "file_hash": "59a98f49678923972be4c5bc250144f23855945c7380550793ef7b0587d3679a",
  "private": false,
  "record": {
    "abstract": "We report on a new test of Lorentz invariance performed by comparing the\nresonance frequencies of two orthogonal cryogenic optical resonators subject to\nEarth\u0027s rotation over 1 year. For a possible anisotropy of the speed of light\nc, we obtain 2.6 +/- 1.7 parts in 10^15. Within the Robertson-Mansouri-Sexl\ntest theory, this implies an isotropy violation parameter beta - delta - 1/2 of\n-2.2 +/- 1.5 parts in 10^9, about three times lower than the best previous\nresult. Within the general extension of the standard model of particle physics,\nwe extract limits on 7 parameters at accuracies down to a part in 10^15,\nimproving the best previous result by about two orders of magnitude.",
    "arxiv_id": "physics/0305117",
    "authors": [
      "Holger Mueller",
      "Sven Herrmann",
      "Claus Braxmaier",
      "Stephan Schiller",
      "Achim Peters"
    ],
    "categories": [
      "physics.class-ph",
      "physics.gen-ph"
    ],
    "doi": "10.1103/PhysRevLett.91.020401",
    "journal_ref": "Phys.Rev.Lett.91:020401,2003",
    "title": "Modern Michelson-Morley experiment using cryogenic optical resonators",
    "url": "https://arxiv.org/abs/physics/0305117"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2f5e25ff-0d44-4c5d-982d-7904e88c085c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}