Electrical conductivity and thermal dilepton rate from quenched lattice QCD

TL;DR

This study performs a continuum extrapolation of vector current correlators in quenched QCD to constrain electrical conductivity and dilepton rates in the quark-gluon plasma, providing new results at multiple temperatures.

Contribution

It introduces a systematic analysis of cut-off effects on light quark correlators and offers refined estimates of electrical conductivity and dilepton production rates in quenched QCD.

Findings

Constraints on electrical conductivity in the quark-gluon plasma.

New dilepton rate estimates at different temperatures.

Analysis of cut-off effects on correlator calculations.

Abstract

We report on a continuum extrapolation of the vector current correlation function for light valence quarks in the deconfined phase of quenched QCD. This is achieved by performing a systematic analysis of the influence of cut-off effects on light quark meson correlators at $T\simeq 1.45 T_c$ using clover improved Wilson fermions. We discuss resulting constraints on the electrical conductivity and the thermal dilepton rate in a quark gluon plasma. In addition new results at 1.2 and 3.0 $T_c$ will be presented.