An anisotropic three-fluid model for heavy ion reactions

The nucleons taking part in heavy ion reaction are considered as a three-fluid system. The first and second components correspond to the nucleons of the target and the projectile, while the thermalised nucleons produced in the course of the collision belong to the third component. Making use of the Boltzmann-equation, hydrodynamical equations are derived which yield also the anisotropy of the momentum distribution. The equation of state for anisotropic nuclear matter is derived from a field theoretical model in the mean field approximation. (author)