Dilepton production from virtual bremsstrahlung induced by proton capture
D. Van Neck, A. E. L. Dieperink, O. Scholten
Abstract
Dilepton production following radiative capture of a proton on a nuclear target is studied in the Impulse Approximation. The cross section is decomposed in terms of four time-like nuclear structure functions through a longitudinal-transverse separation of the nuclear current. Using a simple PWIA model, cross sections and conversion factors are calculated for capture reactions p + n >> d + e+ e-, p + p >> 2He + e+ e- and p + 11B >> 12C + e+ e- at proton energies of 100-200 MeV. The result is compared with a recent measurement of the conversion factor for p + 11B.
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