Covariant kinetic theory for effective fugacity quasi particle model and first order transport coefficients for hot QCD matter

摘要

An effective relativistic kinetic theory has been constructed for aninteracting system of quarks, anti-quarks and gluons within a quasi-particledescription of hot QCD medium at finite temperature and baryon chemicalpotential, where the interactions are encoded in the gluon and quark effectivefugacities with non-trivial energy dispersions. The local conservations ofstress-energy tensor and number current require the introduction of a meanfield term in the transport equation which produces non-vanishing contributionto the first order transport coefficients. Such contribution has been observedto be significant for the temperatures which are closer to the QCD transitiontem- perature, however, induces negligible contributions beyond a few times thetransition temperature. As an implication, impact of the mean fieldcontribution on the the temperature dependence of the shear viscosity, bulkviscosity and thermal conductivity of a hot QCD medium in the presence ofbinary, elastic collisions among the constituents, has been investigated.Visible effects have been observed for the temperature regime closer to the QCDtransition temperature.