{
  "annotation_id": "748d96b6-3670-4b46-9eba-10a322a277f5",
  "date_created": "2026-03-02T18:00:14.563000Z",
  "date_modified": "2026-03-02T18:00:14.563000Z",
  "file_hash": "6eccffff8c90c51ac53d953a41bbce6575fc57c8e5dc7d5d425bc2bb4921b111",
  "private": false,
  "record": {
    "abstract": "A full calculation of lepton-pair angular characteristics is carried out for\n$e^+e^-$ pairs created in $p + Be$ and $Ca + Ca$ collisions from 1.0 to 2.1\nGeV/A. It is demonstrated that the dilepton decay anisotropy depends\nsensitively on the different sources and may be used for their disentangling.\nDue to the dominance of the $\\eta$-and $\\Delta$-Dalitz decays and only a small\nanisotropy coefficient for $\\pi^+\\pi^-$ annihilation, the expected anisotropy\ncoefficients show a decrease with invariant mass of the dilepton pair and\nchange only moderately when comparing $p + Be$ and $Ca + Ca$ reactions at the\nsame bombarding energy.",
    "arxiv_id": "nucl-th/9601018",
    "authors": [
      "E. L. Bratkovskaya",
      "W. Cassing",
      "U. Mosel"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/0370-2693(96)00302-4",
    "journal_ref": "Phys.Lett. B376 (1996) 12-18",
    "title": "Dilepton anisotropy from $p + Be$ and $Ca + Ca$ collisions at BEVALAC   energies",
    "url": "https://arxiv.org/abs/nucl-th/9601018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "11a2160f-b048-4efe-80eb-6b45f80bf54e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}