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We study correlation functions of spatially separated static quark-antiquarkpairs in $2+1$ flavor QCD in order to investigate the nature of color screeningat high temperatures. We perform lattice calculations in a wide temperaturerange, $116~\text{MeV} \leq T \leq 5814~\text{MeV}$, using the highly improvedstaggered quark (HISQ) action and several lattice spacings to controldiscretization effects. We alleviate the UV noise problem through the use offour dimensional hypercubic (HYP) smearing, which enables the reconstruction ofcorrelators and determination of screening properties even at low temperaturesand at large distances.

Color screening in $2+1$ flavor QCD at large distances