Observation of Gaussian Pseudorapidity Distributions for Produced Particles in Proton-Nucleus Collisions at Tevatron Energies

摘要

The statistical event-by-event analysis of inelastic interactions of protons in emulsion at ?GeV reveals the existence of group of events with Gaussian pseudorapidity distributions for produced particles, as suggested by hydrodynamic-tube model. Events belong to very central collisions of protons with heavy emulsion nuclei with probability of realization of less than % and with multiplicity of shower particles exceeding ( times) the average multiplicity in proton-nucleus collisions in emulsion. Bjorken’s energy density for these events reaches ?GeV per . The data are interpreted as a result of the QCD phase transition in proton-tube collisions at Tevatron energies.