dorsal/arxiv
View SchemaAnother Look at ``soft'' lepton pair production in nucleon-nucleon bremsstrahlung
| Authors | Jianming Zhang, Rahma Tabti, Charles Gale, Kevin Haglin |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9501015 |
| URL | https://arxiv.org/abs/nucl-th/9501015 |
| DOI | 10.1142/S0218301397000263 |
| Journal | Int.J.Mod.Phys. E6 (1997) 475-496 |
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.
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"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"
},
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