Energy dependence of exclusive vector-meson production in ep interactions at HERA

Abstract

The energy dependence of exclusive vector meson (V) production is studied using the ZEUS data. The SU(4) universality of V cross sections in the $Q^2+M_V^2$ scale is tested. The energy dependence of the ratio of the cross sections for V production to the total $γ^*p$ cross section is compared with expectations based on pQCD and Regge approaches.

Talk presented at the Xth International Workshop on Deep Inelastic Scattering (DIS02), April 30 - May 4, 2002, Cracow, Poland