{
  "id": "nucl-th/9501015",
  "version": "v1",
  "published": "1995-01-17T21:44:59.000Z",
  "updated": "1995-01-17T21:44:59.000Z",
  "title": "Another Look at ``soft'' lepton pair production in nucleon-nucleon bremsstrahlung",
  "authors": [
    "Jianming Zhang",
    "Rahma Tabti",
    "Charles Gale",
    "Kevin Haglin"
  ],
  "comment": "29 pages, ReVTeX 3.0, with 13 figures postscript figures uuencoded and appended.",
  "journal": "Int.J.Mod.Phys. E6 (1997) 475-496",
  "categories": [
    "nucl-th",
    "hep-ph"
  ],
  "abstract": "We compare different formalisms for the calculation of lepton pair emission in hadron-hadron collisions and discuss the consequences of the approximations inherent to each of them. Using a Lorentz-covariant and gauge-invariant formalism proposed by Lichard, we calculate lepton pair emission via bremsstrahlung in proton-proton and neutron-proton reactions at energies between 1 and 5 GeV to leading order in the virtual photon four-momentum. These new results suggest that some previous bremsstrahlung calculations based on varieties of the soft-photon approximation might have somewhat overestimated the DLS low-mass dilepton cross sections. We find that the respective intensities of dilepton production through $p p$ and $n p$ bremsstrahlung are energy-dependent and become comparable at $E_{\\rm kin} \\agt $ 2 GeV. We also calculate the polar angle anisotropy of the lepton spectrum.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1995-01-17T21:44:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "lepton pair production",
      "nucleon-nucleon bremsstrahlung",
      "lepton pair emission",
      "dls low-mass dilepton cross sections",
      "polar angle anisotropy"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1142/S0218301397000263",
      "journal": "International Journal of Modern Physics E",
      "year": 1997,
      "volume": 6,
      "number": 3,
      "pages": 475
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 29,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 392249,
      "adsabs": "1997IJMPE...6..475Z"
    }
  }
}