Effect of spectral modification of $ρ$ on shear viscosity of a pion gas

Details Effect of spectral modification of $ρ$ on shear viscosity of a pion gas Effect of spectral modification of $ρ$ on shear viscosity of a pion gas

2012-04-11

arxiv.org/abs/1204.2388v1

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

We evaluate the shear viscosity of a pion gas in the relativistic kinetic theory approach. The in-medium propagator of the $\rho$ meson at finite temperature is used to evaluate the $\pi-\pi$ scattering amplitude in the medium. The real and imaginary parts of the self-energy calculated from one-loop diagrams are seen to have noticeable effects on the scattering cross-section. The consequences on temperature dependence of the shear viscosity evaluated in the Chapman-Enskog and relaxation time approximations are studied.

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