Momentum transfer dependence of heavy quarkonium electroproduction

Abstract

We investigate the momentum transfer dependence of differential cross sections d\sigma/dtdσ/dt in diffractive electroproduction of heavy quarkonia on proton targets. Model predictions for d\sigma/dtdσ/dt within the light-front QCD dipole formalism are based on a realistic model for a proper correlation between the impact parameter \vec bb⃗ of a collision and color dipole orientation \vec rr⃗. We demonstrate a significance of \vec b-\vec rb⃗−r⃗ correlation by comparing with a standard simplification \vec{b}\parallel\vec{r}b⃗∥r⃗, frequently used in the literature.