Shear and bulk viscosities for pure glue matter

Shear eta and bulk zeta viscosities are calculated in a quasiparticle model within a relaxation-time approximation for pure gluon matter. Below T-c, the confined sector is described within a quasiparticle glueball model. The constructed equation of state reproduces the first-order phase transition for the glue matter. It is shown that with this equation of state, it is possible to describe the temperature dependence of the shear viscosity to entropy ratio eta/s and the bulk viscosity to entropy ratio zeta/s in reasonable agreement with available lattice data, but absolute values of the zeta/s ratio underestimate the upper limits of this ratio in the lattice measurements typically by an order of magnitude.