Proton structure and elastic scattering amplitudes

Abstract

Three main statements are advocated in this talk: 1. Protons become more active at the periphery with increase of their collision energy as follows from comparison of ISR and LHC data. 2. The geometric scaling is violated even in the diffraction region as follows from comparison of lower energy and LHC data. 3. The problem of the ratio of real to imaginary parts of the elastic scattering amplitude at non-zero transferred momenta is very crucial. The talk is based on arXiv:1206.5474 (review), 1202.2016, 1204.1914, 1204.4866, 1208.3073, 1209.1935, 1212.3313, 1304.5345, 1306.5384. All papers have been published already.