{
  "annotation_id": "e3a37e27-da76-4859-87c7-48a04fde6181",
  "date_created": "2026-03-02T18:00:25.832000Z",
  "date_modified": "2026-03-02T18:00:25.832000Z",
  "file_hash": "18ed2a1b21ca8dbd8a58a1e9d88b61f0da7cc0b02254d6206ff09424f656c224",
  "private": false,
  "record": {
    "abstract": "We use dispersion relations to reconstruct, in a model-independent way, the\nformation dynamics of heavy quarkonium from the experimental data on e+ e-\nannihilation to Q-bar Q. We extract a distribution of formation times with a\nmean value for the J/psi, tau{J/psi} = 0.44 fm; and for the Upsilon,\ntau{Upsilon} = 0.32 fm. The corresponding widths of these distributions are\ngiven by Delta-tau{J/psi} = 0.31 fm and Delta-tau{Upsilon} = 0.28 fm. This\ninformation can be used as an input in modeling of heavy quarkonium production\non nuclear targets.",
    "arxiv_id": "nucl-th/9907021",
    "authors": [
      "D. Kharzeev",
      "R. L. Thews"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1103/PhysRevC.60.041901",
    "journal_ref": "Phys.Rev. C60 (1999) 041901",
    "title": "Quarkonium Formation Time in a Model-Independent Approach",
    "url": "https://arxiv.org/abs/nucl-th/9907021"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cb048c90-fe4d-43ec-89c4-6ad7d165f7d4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}