Speaker
Description
The soft diffraction phenomena in the elastic proton-proton scattering are reviewed from the viewpoint of experiments at the LHC (TOTEM and ATLAS collaboration). Based on the analysis of the new LHC experimental data on the elastic proton-proton scattering, which announce the non-exponential behavior of the differential cross sections of the diffraction cone, different model assumptions are examined taking into account the analytical properties of the scattering amplitude.The influence of the different assumptions on the extraction of the parameters of the elastic scattering amplitude, especially on the size of the total cross sections, is examined. The impact of the real part of the scattering amplitude on the behavior of the differential cross sections is analysed in a wide region of the momentum transfer based on the dispersion relations in the local and integral forms. In the framework of the High Energy Generalized Structure (HEGS) model the impact of the unitarization procedure on the form of the diffraction structure in a wide energy region is analysed.
The corresponding functions and the energy dependence of the main parameters of the dip/bum structure of the differential cross sections are obtained. The different models of the hadron structure are analyzed. Their predictions for the elastic scattering differential cross sections are compared with the recent experimental data of the TOTEM and Atlas Collaborations.