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arXiv · 1804.10600

Color screening in (2+1)-flavor QCD

TUMQCD collaboration·Alexei Bazavov·Nora Brambilla·Peter Petreczky·Antonio Vairo·Johannes Heinrich Weber
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Abstract

We study correlation functions of spatially separated static quark-antiquark pairs in (2+1)-flavor QCD in order to investigate onset and nature of color screening at high temperatures. We perform lattice calculations in a wide temperature range, $140 \le T \le 5814\,{\rm MeV}$, using the highly improved staggered quark action and several lattice spacings to control discretization effects. By comparing at high temperatures our lattice results to weak-coupling calculations as well as to the zero temperature result for the energy of a static quark-antiquark pair, we observe that color screening sets in at $rT \approx 0.3$. Furthermore, we also observe that in the range $0.3 \lesssim r T \lesssim 0.6$ weak-coupling calculations in the framework of suitable effective field theories provide an adequate picture of color screening.

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TUMQCD collaboration, Alexei Bazavov, Nora Brambilla, Peter Petreczky, Antonio Vairo, Johannes Heinrich Weber. 2019-01-21. Color screening in (2+1)-flavor QCD. https://doi.org/10.1103/physrevd.98.054511

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