Valeriya Mykhaylova
Dynamical and transport properties of deconfined matter in hot QCD
We study transport properties of the deconfined matter with different number of quark flavors employing the quasiparticle model (QPM). The system then consists of the dynamical gluons (and quarks) dressed by the effective temperature-dependent masses. The temperature dependence is specified by a running coupling deduced from lattice QCD thermodynamics. Utilizing kinetic theory under the relaxation time approximation, we evaluate the shear and bulk viscosity, as well as the electrical conductivity, to illustrate the role of the quasiquarks in transport properties of the QGP [1, 2]. We also evaluate the bulk to shear viscosity ratio, which illustrates the impact of dynamical quarks onto the restoration of conformal invariance. Further, we analyze the production of the charm quarks in hot QCD medium. The temperature and time evolution of the number of charm quarks is examined in perfect fluid expanding longitudinally (Bjorken scaling) and viscous QGP, whose expansion in 2+1 dimensions is dictated by the hydrodynamic simulations with the shear viscosity taken into account [3]. [1] V. Mykhaylova, M. Bluhm, K. Redlich and C. Sasaki, Phys. Rev. D 100 (2019) [2] V. Mykhaylova, C. Sasaki, Phys. Rev. D 103 (2022) [3] J. Auvinen et al., Phys. Rev. C 102 (2020)