Time-like compton scattering and the Bethe-Heitler processStephen R. Cotanch
Department of Physics, North Carolina State University, Raleigh NC 27695-8202, USA
(Received 15 October 2004 / Published online 08 February 2005)
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 φ meson region governing the φ N couplings gV,Tφ N N. 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.
PACS: 12.40.Nn Regge theory - 12.40.Vv Vector-meson dominance - 13.40.Gp Electromagnetic form factors - 13.40.Hq Electromagnetic decays
© Società Italiana di Fisica, Springer-Verlag 2005