Spin density matrix elements in vector meson leptoproduction

Abstract

It is reported on an analysis of vector meson leptoproduction at small Bjorken-$x$ and large photon virtuality within an approach that bases on generalized parton distributions (GPDs). This approach leads to results for cross sections and spin density matrix elements for $\ddot{I}$ and $\ddot{I}•$ leptoproduction in fair agreement with experiment.

Report at Spin 2004 Symposium, October 10-16, Trieste, Italy