Eikonal model analysis of elastic proton–proton collisions at 52.8 GeV and 8 TeV Jiří Procházka and Vojtěch Kundrát Eur. Phys. J. C, 80 8 (2020) 779 Published online: 26 August 2020 DOI: 10.1140/epjc/s10052-020-8334-7