{
  "annotation_id": "487c7067-b44b-45b5-9aea-0b461d81bf77",
  "date_created": "2026-03-02T18:00:36.293000Z",
  "date_modified": "2026-03-02T18:00:36.293000Z",
  "file_hash": "be8604e2f104fe7eea45717e969ace4fc9bcb6c15e3636678b740fa19dba61a2",
  "private": false,
  "record": {
    "abstract": "It is shown that the Dirac theory implies complex space-time and complex\nspace-time can lead to the Dirac equation. It is suggested that fermions are\ngrouped into doublets, those doublets are then divided into color singlets\n(leptons) and color triplets (quarks), then they are further divided into\ngeneration singlets and generation triplets. If the exclusion principle for\nfermions works in the internal space, then the non-observation of free quarks\ncan be explained. However, it is suggested that a possible new free quark may\nexist with a color triplet and generation singlet state which is antisymmetric\nin the internal space.",
    "arxiv_id": "physics/0109019",
    "authors": [
      "Lu Lin"
    ],
    "categories": [
      "physics.gen-ph"
    ],
    "title": "Complex space-time and the classification of elementary particles",
    "url": "https://arxiv.org/abs/physics/0109019"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b37846d5-c0c5-4de0-a86e-e7a6b1fe7a3f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}