Aspects of the Unitarized Soft Multipomeron Approach in DIS and Diffraction

We study in detail the main features of the unitarized Regge model (CFKS), recently proposed to describe the small-$Q^2$ domain. It takes into account a two-component description, which handles with multiple soft Pomeron exchanges contribution, interacting with the large dipole size configurations, and a unitarized dipole cross section, describing the interaction with the small size dipoles. Its extrapolation to higher virtualities is performed, analysing the ratio between soft and hard pieces and discussing the resulting dipole cross section in comparison to that from the saturation model. Diffraction dissociation is also considered, showing the scaling violations in diffractive DIS and estimating the corresponding logarithmic slope