Photoproduction ofJ(ψ)particles and rising photon-nucleon cross sections

The existence of vector mesons with masses above 3 GeV suggests study of their contributions to the Compton sum rule. The Compton sum rule is used to place upper limits on photoproduction cross sections for such recently discovered and yet to be found $J^P=1^{-}$ particles. We are led to the result that the total proton photoabsorption cross section and forward Compton-scattering cross section will rise in the range of energies (above ∼ 50 GeV) available for photon experiments at the Fermilab accelerator. Discussion is given on the implications of such a rising photon-proton cross section for vector-meson dominance (VMD), the quark model, generalized VMD, and the new duality, and for scaling breaking.