{
  "annotation_id": "796f22d8-b3b8-4f49-9569-2ca4a0c2c693",
  "date_created": "2026-03-02T18:00:25.260000Z",
  "date_modified": "2026-03-02T18:00:25.260000Z",
  "file_hash": "05607bea48c061590c447b2ba34819180e22492dcf9016a3926981f0ce04280c",
  "private": false,
  "record": {
    "abstract": "Using a hydrodynamic approach to describe Pb+Au collisions at 158 AGeV/c, we\nanalyze e+e- yields from matter containing baryons in addition to mesons. We\nemploy e+e- production rates from two independent calculations, which differ\nboth in their input physics and in their absolute magnitudes, especially in the\nmass range where significant enhancements over expected backgrounds exist in\nthe CERES data. Although the presence of baryons leads to significant\nenhancement of e+e- emission relative to that from mesons-only matter, the\ncalculated results fall below the data in the range 400 \u003c M_ee/MeV \u003c 600, by a\nfactor of 2-3. Since the calculated e+e- spectra are relatively insensitive to\nthe equation of state for initial conditions that fit the observed hadronic\nspectra, either in-medium modifications of the e+e- sources more significant\nthan so far considered, or the presence of hitherto unidentified additional\nsources of e+e- is indicated.",
    "arxiv_id": "nucl-th/9812028",
    "authors": [
      "Pasi Huovinen",
      "Madappa Prakash"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1016/S0370-2693(99)00134-3",
    "journal_ref": "Phys.Lett. B450 (1999) 15-23",
    "title": "e+e- yields in Pb+Au collisions at 158 AGeV/c: Assessment of baryonic   contributions",
    "url": "https://arxiv.org/abs/nucl-th/9812028"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9529bd91-5e2f-4b90-b427-4027a2e2d0fb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}