Abstract

The properties of matter under conditions dominated by the strong-interaction are probed in ultra-relativistic heavyion collisions. In connection with measurements of the elliptic flow at RHIC and the LHC the shear viscosity is of particular interest. In this talk I discuss recent results for η/s in hadronic matter at vanishing baryo-chemical potential within kinetic theory. Using the Nambu Jona-Lasinio model, special attention is paid to effects arising from the restoration of spontaneously broken chiral symmetry with increasing temperature.

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