Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-04-26
J.Phys.Conf.Ser.230:012045,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 4 figures; To appear in the proceedings of the 26th Winter Workshop on Nuclear Dynamics (2010).
Scientific paper
10.1088/1742-6596/230/1/012045
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 $\eta/s$. Furthermore we compare our results with those obtained by solving the relativistic causal dissipative fluid equations of Israel and Stewart (IS), in order to show the validity of the IS hydrodynamics. Employing the parton cascade we also investigate the formation of Mach shocks induced by a high-energy gluon traversing viscous gluon matter. For $\eta/s = 0.08$ a Mach cone structure is observed, whereas the signal smears out for $\eta/s \geq 0.32$.
Bouras Ioannis
El Andrej
Fochler Oliver
Greiner Carsten
Lauciello Francesco
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