Author/Authors :
I. Bouras، نويسنده , , Beth E. Molnar، نويسنده , , Antti H. Niemi، نويسنده , , Z. Xu، نويسنده , , A. El، نويسنده , , O. Fochler، نويسنده , , C. Greiner، نويسنده , , D.H. Rischke، نويسنده ,
Abstract :
To investigate the formation and the propagation of relativistic shock waves in viscous gluon matter we solve the relativistic Riemann problem using a microscopic parton cascade. We demonstrate the transition from ideal to viscous shock waves by varying the shear viscosity to entropy density ratio η/s. We show that an η/s ratio larger than 0.2 prevents the development of well-defined shock waves on time scales typical for ultrarelativistic heavy-ion collisions. These findings are confirmed by viscous hydrodynamic calculations.
