Static quark-antiquark interactions at nonzero temperature from lattice QCD

We study the interactions of a static quark antiquark pair at non-zero temperature using realistic 2+1 flavor lattice QCD calculations. The study consists of two parts: the first investigates the properties of Wilson line correlators in Coulomb gauge and compares to predictions of hard-thermal loop...

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Bibliographic Details
Published in:Physical review. D 2022-03, Vol.105 (5), Article 054513
Main Authors: Bala, Dibyendu, Kaczmarek, Olaf, Larsen, Rasmus, Mukherjee, Swagato, Parkar, Gaurang, Petreczky, Peter, Rothkopf, Alexander, Weber, Johannes Heinrich
Format: Article
Language:English
Subjects:
Bayesian methods
color confinement
finite temperature field theory
heavy quark effective theory
lattice field theory
lattice QCD
NUCLEAR PHYSICS AND RADIATION PHYSICS
quark-gluon plasma
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Summary:We study the interactions of a static quark antiquark pair at non-zero temperature using realistic 2+1 flavor lattice QCD calculations. The study consists of two parts: the first investigates the properties of Wilson line correlators in Coulomb gauge and compares to predictions of hard-thermal loop perturbation theory. As a second step we extract the spectral functions underlying the correlators using four conceptually different methods: spectral function fits, a HTL inspired fit for the correlation function, Padé rational approximation and the Bayesian BR spectral reconstruction. We find that our high statistics Euclidean lattice data are amenable to different hypotheses for the shapes of the spectral function and we compare the implications of each analysis method for the existence and properties of a well defined ground state spectral peak.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.105.054513