### Session FF: Mini-Symposium: Viscosity, String Theory and Hydrodynamics

8:30 AM–10:30 AM, Saturday, October 25, 2008
Room: Simmons Ballroom 4

Chair: W.A. Zajc, Columbia University

Abstract ID: BAPS.2008.DNP.FF.6

### Abstract: FF.00006 : Propagating Mach Cones in a Viscous Quark-Gluon Plasma

9:54 AM–10:06 AM

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#### Author:

R. Bryon Neufeld
(Duke University)

I will discuss the space-time distribution of energy and momentum deposited by a fast parton traversing a perturbative quark-gluon plasma (arXiv:0805.0385 [hep-ph]). I use this distribution as a source term for the linearized hydrodynamical equations of the medium and present the resulting dynamics for three different values of the shear viscosity to entropy density ratio, $\eta/s$: $1/4\pi$, $3/4\pi$ and $6/4\pi$. I show that well defined Mach cones are found for $\eta/s = 1/4\pi, 3/4\pi$ but the conical structure begins to smear out for $\eta/s = 6/4\pi$.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.DNP.FF.6