A hybrid model for ${\gamma }^{\ast }p$ scattering at small Bjorken-x

Abstract

We extend the dipole model for virtual photon - proton scattering to include the resolved photon component explicitly. The parameters of the resolved photon component are taken from the literature, while the parameters of the dipole-nucleon interaction are fitted to the HERA data. A good agreement with experimental data is obtained beyond the region of the fit.

Comments: 5 pages, 2 figures, a talk at the XI international workshop on Deep Inelastic Scattering, St. Petersburg, 23-27 April 2003