MULTIFLUID DYNAMICS OF INTERMEDIATE-ENERGY HEAVY-ION COLLISIONS

An extension of the multifluid approach to the description of heavy-io n collisions is proposed. A three-fluid model involving mean sigma and omega fields is formulated for heavy-ion collisions at incident energ ies around 1 GeV per nucleon. It is a natural extension of a similar t wo-fluid model developed in our recent papers and is intended to obtai n a closer approximation to the complete relativistic mean-field kinet ic theory. The collisional coupling between the fluids is formulated i n terms of hadron-hadron cross sections (which take into account Pauli blocking). The model contains no fitting parameters. The relativistic mean-field three-fluid model mean field three-fluid model (RMF-3FM) i s tested for the case of thermalization in counter-streaming nuclear f luids. Comparison with the results obtained in relativistic Landau-Vla sov kinetics and in a similar two-fluid model (RMF-2FM) shows that the RMF-3FM reproduces the gross properties of the equilibration better t han the RMF-2FM.