Theory Seminar

Temperature dependence of shear viscosity of SU(3) gluodynamics within lattice simulation

by Dr Victor Braguta (ITEP, Moscow)

Europe/Berlin
KBW 2.27 (GSI)

KBW 2.27

GSI

Description
This report is devoted to the study of temperature dependence of shear viscosity in SU(3)-gluodynamics within lattice simulation of QCD. To calculate shear viscosity we carried out high accuracy lattice measurements of the energy-momentum tensor T12T12 correlation functions for a set of temperatures in the region T/Tc in (0.9, 1.5). The results of the calculation allow us to determine temperature dependence of the ratio of shear viscosity to the entropy density eta/s for gluodynamics. Our results are close to experimental measurement of shear viscosity, N=4 supersymmetric Yang Mills and considerably deviate from perturbative calculations. Using the results of the lattice calculations we also estimate the ratio eta/s for QCD with dynamical quarks.