Shear viscosity of a pion gas due to $\rho \pi \pi$ and $\sigma \pi \pi$ interactions

Sabyasachi Ghosh, Gastao Krein, Saurav Sarkar

We have calculated the shear viscosity of pion medium, where propagating pion has some finite thermal width due to interaction with the low mass resonances, $\sigma$ and $\rho$. With the h…