Mach Cones in Viscous Matter

Abstract

Employing a microscopic transport model we investigate the evolution of high energetic jets moving through a viscous medium. For the scenario of an unstoppable jet we observe a clearly strong collective behavior for a low dissipative system $\eta /s\approx 0.005$, leading to the observation of cone-like structures. Increasing the dissipation of the system to $\eta /s\approx 0.32$ the Mach Cone structure vanishes. Furthermore, we investigate jet-associated particle correlations. A double-peak structure, as observed in experimental data, is even for low-dissipative systems not supported, because of the large influence of the head shock.

Comments: 4 pages, 3 figures, to appear in the conference proceedings of Hot Quarks 2010