A dependence of correlations of cumulative protons with near impulses

To study interaction region sizes investigated were correlations of cumulative protons escaping from nuclei of small relative momenta. Preliminary results of studying the pA → ppX reaction at 8.3 GeV/c momentum using Al, Cu, Pb nuclei are presented. Secondary protons were registered at 110-160 deg in laboratory system and had energies of 320-350 MeV/c. Distribution of the number of proton pairs depending on the perpendicular component of their relative momentum is shown not to change and depending on a longitudinal one changes with changing A