Some analysis of hadron-nucleon collisions at high energy inelastic interactions in photo-emulsion

The interaction of 400 GeV/c protons and 340 GeV/c pi(-) with nucleons in nuclear emulsion has been investigated. The interaction mean free paths (m.f.p.) and the corresponding reaction cross-sections (sigma(in)) have been found, the multiplicity distributions for the events with N-h = 0 (clean events) are measured and studied as well as the angular and pseudorapidity distributions. Finally the coherent multiparticle production cross-sections (sigma(coh)) were estimated and compared with other data, where it was found to be increasing slowly with increasing incident momentum for protons while it increases rapidly with increasing pi(-)-momentum.