arXiv:1804.10600·v2·High Energy Physics — Lattice
Color screening in (2+1)-flavor QCD
TUMQCD collaboration: Alexei Bazavov (1)🇺🇸 · Nora Brambilla (2,3)🇩🇪 · Peter Petreczky (4)🇺🇸 · Antonio Vairo (2)🇩🇪 · Johannes Heinrich Weber (1,2,5) ((1) Department of Computational Mathematics, Science and Engineering and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA (2) Physik Department, Technische Universit ät München, D-85748 Garching, Germany (3) Institute of Advanced Studies, Technische Universität München, D-85748 Garching, Germany (4) Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA (5) Exzellenzcluster Universe, Technische Universität M ünchen, D-85748 Garching, Germany)🇩🇪
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, , 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 . Furthermore, we also observe that in the range weak-coupling calculations in the framework of suitable effective field theories provide an adequate picture of color screening.
Comments: 48 pages; 33 figures