{
  "annotation_id": "c712ebe0-2cd9-4440-850d-21b54d5a29c9",
  "date_created": "2026-03-02T18:00:22.363000Z",
  "date_modified": "2026-03-02T18:00:22.363000Z",
  "file_hash": "fac711595a5796598dbce8d6ff8d79dd689aa9c8c80a46f36880e0347cf6e714",
  "private": false,
  "record": {
    "abstract": "We compute the Coulomb effects produced by an expanding, highly charged\nfireball on the momentum distribution of pions. We compare our results to data\non Au+Au at 11.6 A GeV from E866 at the BNL AGS and to data on Pb+Pb at 158 A\nGeV from NA44 at the CERN SPS. We conclude that the distortion of the spectra\nat low transverse momentum and mid-rapidity can be explained in both\nexperiments by the effect of the large amount of participating charge in the\ncentral rapidity region. By adjusting the fireball expansion velocity to match\nthe average transverse momentum of protons, we find a best fit when the\nfireball radius is about 10 fm, as determined by the moment when the pions\nundergo their last scattering. This value is common to both the AGS and CERN\nexperiments.",
    "arxiv_id": "nucl-th/9807062",
    "authors": [
      "Alejandro Ayala",
      "Sangyong Jeon",
      "Joseph Kapusta"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.59.3324",
    "journal_ref": "Phys.Rev. C59 (1999) 3324-3328",
    "title": "Size of Fireballs Created in High Energy Lead-Lead Collisions as   Inferred from Coulomb Distortions of Pion Spectra",
    "url": "https://arxiv.org/abs/nucl-th/9807062"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7be53f7a-8628-4ad7-97ee-d44749f44f05",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}