Bulk and shear viscosities of hot and dense hadron gas

Understand

We estimate bulk and shear viscosity at finite temperature and baryon densities of hadronic matter within hadron resonance gas model.

• For bulk viscosity we use low energy theorems of QCD for the energy momentum tensor correlators.
• For shear viscosity coefficient, we estimate the same using molecular kinetic theory to relate the shear viscosity coefficient to average momentum of the hadrons in the hot and dense hadron gas.
• The bulk viscosity to entropy ratio increases with chemical potential and is related to the reduction of velocity of sound at nonzero chemical potential.