A Unified Model of Exclusive ${\rho }^0$, $\varphi$ and $\text{jpsi}$ Electroproduction

Abstract

A two-component model is developed for diffractive electroproduction of ${\rho }^0$, $\varphi$ and $\text{jpsi}$, based on non-perturbative and perturbative two-gluon exchange. This provides a common kinematical structure for non-perturbative and perturbative effects, and allows the role of the vector-meson vertex functions to be explored independently of the production dynamics. A good global description of the vector-meson data is obtained.

Comments: 30 pages, 35 figures