Transition from ideal to viscous Mach cones in BAMPS
  We investigate in a microscopical transport model the evolution of conical structures originating from the supersonic projectile moving through the matter of ultrarelativistic particles. Using different scenarios for the interaction between projectile and matter, and different transport properties of the matter, we study the formation and structure of Mach cones. Furthermore, the two-particle correlations for different viscosities are extracted from the numerical calculations and we compare them to an analytical approximation. In addition, by adjusting he cross section we investigate the influence of the viscosity to the structure of Mach cones. 
Ioannis Bouras, Andrej El, Oliver Fochler, Harri Niemi, Zhe Xu and   Carsten Greiner
hep-ph physics.comp-ph