Three-Fluid Simulations of Relativistic Heavy-Ion Collisions

Abstract

A relativistic 3-fluid 3D hydrodynamic model has been developed for describing heavy-ion collisions at incident energies between few and $\sim$ 200 A$\cdot$GeV. In addition to two baryon-rich fluids which simulate mutually decelerating counterflows of target and projectile nucleons, the new model incorporates evolution of a third, retarded baryon-free fluid created by this decelerated baryonic matter. Different equations of state, including those with the deconfinement phase transition, are treated. A reasonable agreement with experiment is illustrated by proton rapidity spectra, their dependence on collision centrality and beam energy.

11 pages, 3 figures, to be published in the Proceedings of the XII International Conference on selected Problems of Modern Physics dedicated to 95th annuversary of D.I. Blokhintsev's birth, Dubna, June 8-11, 2003