Blackening and expansion in elastic hadron scattering

Abstract

Through a diffractive approach to elastic scattering, it is shown that hadrons become blacker and larger as the energy increases in the ISR–Tevatron domain. Comparisons are made with the predictions from geometrical models and hybrid eikonal models (Lipatov Pomeron, dual analytical approach). Connections between blackening–expansion effects and hadronic form factors – elementary amplitudes are also reviewed and discussed.