Scaling properties in the hydrodynamical description of heavy-ion reactions

Abstract

Abstract We discuss scaling properties of heavy-ion reactions which are consequences of a simple hydrodynamical model. In certain kinematic regions the experimentally observed inclusive cross sections satisfy this scaling and so do the cross sections numerically calculated using hydrodynamics. The simple thermal model obeys the same scaling laws, but leads to a differential cross section with a characteristically different shape at very high and very low energies of the outgoing nucleons. The specific experimental data analyzed do not show evidence for a hydrodynamical flow.