Diffractive dissociation in high energy pp collisions in Additive Quark Model

High energy (CERN SPS and LHC) $pp$ ($p\bar{p}$) scattering is treated in the framework of Additive Quark Model together with Pomeron exchange theory. The reasonable agreement with experimental data is achieved both for the elastic scattering and for the diffractive dissociation with natural parameters for the strong matter distribution inside proton.