{
  "annotation_id": "e528911b-4d10-410b-b931-82e194f77c7f",
  "date_created": "2026-03-02T18:00:15.195000Z",
  "date_modified": "2026-03-02T18:00:15.195000Z",
  "file_hash": "73a8562101fb185d18a8eacfa436af5c0acfce33b5eb5eccf708dee1ab03aafc",
  "private": false,
  "record": {
    "abstract": "The heavy quarkonia (Charmonium \\(c\\bar{c}\\) and Bottomonium \\(b\\bar{b}\\))\nare investigated in the framework of the instantaneous BS-equation (Salpeter\nequation). We parametrize confinement alternatively by a linearly rising scalar\nor a vector interaction kernel and take into account the one-gluon-exchange\n(OGE) interaction in the instantaneous approximation. Mass spectra as well as\nleptonic, two-photon, E1 and M1 decay widths are calculated. Our results show\nthat a reasonable description of the experimental data can be obtained with\nboth spin structures for the confining kernel. The relativistic treatment leads\nto an improved description compared to nonrelativistic results for the\ntwo-photon width of the \\(\\eta_c\\) and to some extent for the E1-transition\nwidths. However, characteristic deviations indicate that within a relativistic\nframework confinement is not described adequately by a potential.",
    "arxiv_id": "nucl-th/9407033",
    "authors": [
      "J. Resag",
      "C. R. Muenz"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1016/0375-9474(95)00203-D",
    "journal_ref": "Nucl.Phys.A590:735,1995",
    "title": "Heavy Quarkonia in the Instantaneous Bethe-Salpeter Model",
    "url": "https://arxiv.org/abs/nucl-th/9407033"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "22e4fd29-1008-4562-9d3c-b6984088e4c3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}