Topical Results on Vector-Meson Production from the HERA Collider Experiments

Abstract

The HERA collider experiments H1 and ZEUS have established extensive measurement programs for diffractive vector-meson production processes during the first six years of their operation. The results provide stringent phenomenological tests of quantum chromodynamical descriptions of hard diffraction. We discuss recent topical results on Upsilon photoproduction, on decay-angle analyses of rho0, phi and J/psi electroproduction and on rho0 and phi photoproduction at high momentum transfer.

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