Time-like compton scattering and the Bethe-Heitler process

Abstract

Arguments are presented for p(γ, e + e −)p measurements to obtain new information about the off-shell time-like nucleon form factors, especially in the o meson region governing the oN couplings g oNN V,T . Theoretical predictions based upon a Quantum Hadrodynamic model and vector meson dominance are highlighted for both the proton form factor and the time-like Compton scattering cross section. The Bethe-Heitler process is also calculated but is only important at low momentum transfer ¦t¦ permitting a novel high |t| φ enhancement in the Compton cross section related to nucleon strangeness to emerge.