Theoretical review of diffractive phenomena

We review QCD based descriptions of diffractive deep inelastic scattering emphasising the role of models with parton saturation. These models provide natural explanation of such experimentally observed facts as the constant ratio of the diffractive and total cross sections as a function of the Bjorken variable, and Regge factorization of diffractive parton distributions. The Ingelman-Schlein model and the soft color interaction model are also presented.Comment: plenary presentation at the Baryon04, 25-29 October 2004, Palaiseau, Franc

Unintegrated Double Parton Distributions - a Summary

We present main elements of the construction of unintegrated double parton distribution functions which depend on transverse momenta of partons. We follow the method proposed by Kimber, Martin and Ryskin for a construction of unintegrated single parton distributions from the standard parton distribution functions.Comment: presented at "Diffraction 2016", International Workshop on Diffraction in High Energy Physics, Acireale (Catania, Sicily), Sept 2-8 2016, to be published in the conference proceedings by AI