INFLUENCE OF THE EQUATION OF STATE ON THE MOMENTUM ANISOTROPY IN HADRODYNAMIC EVOLUTION OF RELATIVISTIC HEAVY ION COLLISIONS

We investigate the collective momentum anisotropy in relativistic heavy ion collisions in the BNL-RHIC energy regime with a three-dimensional hydrodynamical simulation code (SPHERIO) for different equations of state. We compare the widely used hadron gas-QGP bag model yielding a strong first order phase transition to other equations of state, which yield a smooth crossover as suggested by lattice QCD calculations.