Study of shear viscosity of SU(2)-gluodynamics within lattice simulation

N.Yu. Astrakhantsev, V.V. Braguta, A.Yu. Kotov
2015 Journal of High Energy Physics  
This paper is devoted to the study of two-point correlation function of the energy-momentum tensor T_12T_12 for SU(2)-gluodynamics within lattice simulation of QCD. Using multilevel algorithm we carried out the measurement of the correlation function at the temperature T/T_c = 1.2. It is shown that lattice data can be described by spectral functions which interpolate between hydrodynamics at low frequencies and asymptotic freedom at high frequencies. The results of the study of spectral
more » ... s allowed us to estimate the ratio of shear viscosity to the entropy density η/s = 0.134 +- 0.057.
doi:10.1007/jhep09(2015)082 fatcat:s37sfia77jhvtid2hoh2mbioge