{
  "annotation_id": "cd3399f3-fefb-4824-8344-461a290c5d7a",
  "date_created": "2026-03-02T18:02:34.316000Z",
  "date_modified": "2026-03-02T18:02:34.316000Z",
  "file_hash": "62d77b46c522126a34857e2a9bffcf8b98b84af201d53d888f2a2507aa8ece33",
  "private": false,
  "record": {
    "abstract": "The neutral B-meson pair produced at the Upsilon(4S) should exhibit a\nnon-local correlation of the type discussed by Einstein, Podolski, and Rosen\n(EPR). We measure this correlation using the time-dependent flavour asymmetry\nof semileptonic B0 decays, which we compare with predictions from quantum\nmechanics and two local realistic models. The data are consistent with quantum\nmechanics, and inconsistent with the other models. Assuming that some B pairs\ndisentangle to produce B0 and B0bar with definite flavour, we find a decoherent\nfraction of 0.029+-057, consistent with no decoherence.",
    "arxiv_id": "quant-ph/0702267",
    "authors": [
      "A. Go",
      "A. Bay"
    ],
    "categories": [
      "quant-ph",
      "hep-ex"
    ],
    "doi": "10.1103/PhysRevLett.99.131802",
    "journal_ref": "Phys.Rev.Lett.99:131802,2007",
    "title": "Measurement of EPR-type flavour entanglement in Upsilon(4S)-\u003eB0 B0bar   decays",
    "url": "https://arxiv.org/abs/quant-ph/0702267"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c346debc-6164-4fe4-add1-8f457ef80bd4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}