{
  "annotation_id": "12e00cba-a73d-4250-a0e0-941611937001",
  "date_created": "2026-03-02T18:00:15.524000Z",
  "date_modified": "2026-03-02T18:00:15.524000Z",
  "file_hash": "fcfca5927c758becde79e59a5f2eda4a5af73b4a2df9c81c1a95b163ebf7eb20",
  "private": false,
  "record": {
    "abstract": "We compare different formalisms for the calculation of lepton pair emission\nin hadron-hadron collisions and discuss the consequences of the approximations\ninherent to each of them. Using a Lorentz-covariant and gauge-invariant\nformalism proposed by Lichard, we calculate lepton pair emission via\nbremsstrahlung in proton-proton and neutron-proton reactions at energies\nbetween 1 and 5 GeV to leading order in the virtual photon four-momentum. These\nnew results suggest that some previous bremsstrahlung calculations based on\nvarieties of the soft-photon approximation might have somewhat overestimated\nthe DLS low-mass dilepton cross sections. We find that the respective\nintensities of dilepton production through $p p$ and $n p$ bremsstrahlung are\nenergy-dependent and become comparable at $E_{\\rm kin} \\agt $ 2 GeV. We also\ncalculate the polar angle anisotropy of the lepton spectrum.",
    "arxiv_id": "nucl-th/9501015",
    "authors": [
      "Jianming Zhang",
      "Rahma Tabti",
      "Charles Gale",
      "Kevin Haglin"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1142/S0218301397000263",
    "journal_ref": "Int.J.Mod.Phys. E6 (1997) 475-496",
    "title": "Another Look at ``soft\u0027\u0027 lepton pair production in nucleon-nucleon   bremsstrahlung",
    "url": "https://arxiv.org/abs/nucl-th/9501015"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "159a40fa-5eb4-4eba-aa59-df276f997cc6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}