Equation of state of gluon plasma from lattice QCD thermodynamics-quasiparticle approach

We study the equation of state of gluon plasma from lattice QCD in the context of quasiparticle models, where the plasma is considered as an ideal gas of bosons with thermal mass. Lattice studies of the bulk properties of the plasma reveal a pronounced drop in the pressure compared to the energy density as the deconfining temperature is approached from above. We show that this can be explained only by a certain term in the trace anomaly that is linear in the temperature.