Brief introduction to viscosity in hadron physics

Abstract

We introduce the concept of viscosity (both shear and bulk) in the context of hadron physics and in particular the meson gas, highlighting the current theoretical efforts to connect possible measurements of the viscosities to underlying physics such as a phase transition or the trace anomaly.

Comments: 8 pages, 3 figures. Contribution to the Chiral'10 Workshop. Valencia, Spain, June 21-24, 2010