Dilepton production in nucleon-nucleon reactions with and without hadronic inelasticities
1994; American Institute of Physics; Volume: 49; Issue: 1 Linguagem: Inglês
10.1103/physrevc.49.401
ISSN1538-4497
Autores Tópico(s)Particle physics theoretical and experimental studies
ResumoWe calculate elementary proton-proton and neutron-proton bremsstrahlung and their contribution to the ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$ invariant mass distribution. At 4.9 GeV, the proton-proton contribution is larger than neutron-proton, but it is small compared to recent data. We then make a first calculation of bremsstrahlung in nucleon-nucleon reactions with multihadron final states. Again at 4.9 GeV, the many-body bremsstrahlung is larger than simple nucleon-nucleon bremsstrahlung by more than an order of magnitude in the low-mass region. When the bremsstrahlung contributions are summed with Dalitz decay of the \ensuremath{\eta}, radiative decay of the \ensuremath{\Delta} and from two-pion annihilation, the result matches recent high statistics proton-proton data from the Dilepton Spectrometer collaboration.
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