Partial coherent states and saturation of unitary bound for hadron diffraction

The concept of partially coherent states, developed in optics, is spread to the case of hadron scattering. The ratio of unitarity for diffraction process (the Pumplin inequality) is interpreted as the ratio for partially coherent states. The highest coherence state corresponds to the saturation of the inequality and is attained, according to experimental data , in restricted range of energies (√s = 20-70 GeV). It turned out that the highest coherence state in elastic pp-scattering in single and double diffraction dissociation takes place at the same value of certain formation length of the final state lc = I/kc, where kc = 12.5 GeV - momentum of elastically scattered proton in the center-of-mass system. Other manifestations of the local character of hadron diffraction coherence state increase are given