QCD Description of Vector Meson Photoproduction

We investigate the soft (nonperturbative) and hard (perturbative) contributions in the processes of ∫ and ψ photoproduction, studying the energy dependence of the integrated elastic cross sections and the t dependence of the differential cross sections. We show that a coherent sum of the pQCD and conventional soft Pomeron contributions provides good reproduction of the experimental data. The hard contribution is based on a pQCD calculation with screening corrections (SC). The soft part is assumed to have the energy dependence and the shrinking forward peak characteristic of the hadronic interactions at high energies.