Temperature dependence of electrical conductivity and dilepton rates from hot quenched lattice QCD

TL;DR

This study investigates how electrical conductivity and dilepton emission rates in quark-gluon plasma vary with temperature, using lattice QCD simulations to improve the accuracy of these fundamental properties.

Contribution

It provides the first continuum-extrapolated results for vector current correlators and related spectral functions near the critical temperature in quenched lattice QCD.

Findings

Continuum-extrapolated vector correlators near T_c

Constraints on electrical conductivity in quark-gluon plasma

Estimates of thermal dilepton and photon rates

Abstract

We present new results on the continuum extrapolation of the vector current correlation function in the deconfined phase for three temperatures close to the critical temperature utilizing quenched clover improved Wilson fermions and light quark masses. A systematic analysis on multiple lattice spacing allows to perform the continuum limit of the correlation function and to extract spectral properties in the continuum limit. These results provide constraints for the electrical conductivity and the thermal dilepton rates in the quark gluon plasma for the given temperature range. In addition results on the continuum extrapolation at finite momenta related to thermal photon rates are presented.