{
  "annotation_id": "85bd32b7-3919-4fc7-aeb6-ccf5a61c64a1",
  "date_created": "2026-03-02T18:00:25.777000Z",
  "date_modified": "2026-03-02T18:00:25.777000Z",
  "file_hash": "8d9a27788669ea95c90b54ee8132c8213649631325abfc24dd363d7d93f85b98",
  "private": false,
  "record": {
    "abstract": "We review the status of a quasi - degenerate doublets in nuclei, called\npseudospin doublets, which were discovered about thirty years ago and the\norigins of which have remained a mystery, until recently. We show that\npseudospin doublets originate from an SU(2) symmetry of the Dirac Hamiltonian\nwhich occurs when the scalar and vector potentials are opposite in sign but\nequal in magnitude. Furthermore, we survey the evidence that pseudospin\nsymmetry is approximately conserved for a Dirac Hamiltonian with realistic\nscalar and vector potentials. We briefly discuss the relationship of pseudospin\nsymmetry with chiral symmetry and the implications of pseudospin symmetry for\nthe antinucleon spectrum in nuclei.",
    "arxiv_id": "nucl-th/9812035",
    "authors": [
      "Joseph N. Ginocchio"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0370-1573(99)00021-6",
    "journal_ref": "Phys.Rept. 315 (1999) 231-240",
    "title": "A Relativistic Symmetry in Nuclei",
    "url": "https://arxiv.org/abs/nucl-th/9812035"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "977fd7d9-2459-4502-a11f-9d3672344d42",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}