2014/11/12 by Yannis Burnier, Olaf Kaczmarek, Burnier, Yannis +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph
paper · pdf · doi:10.48550/arxiv.1411.3141
8 pages, 6 figures, Poster presented at the 11th International Conference on Quark Confinement and the Hadron Spectrum 2014, St. Petersburg, Russia
arxiv created 2014/11/12 · openalex publication_date 2014/11/12 · arxiv updated 2014/11/13 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28
We report recent results of a non-perturbative determination of the static heavy-quark potential in quenched and dynamical lattice QCD at finite temperature. The real and imaginary part of this complex quantity are extracted from the spectral function of Wilson line correlators in Coulomb gauge. To obtain spectral information from Euclidean time numerical data, our study relies on a novel Bayesian prescription that differs from the Maximum Entropy Method. We perform simulations on quenched 323× Nτ (β=7.0,ξ=3.5) lattices with Nτ=24,...,96, which cover 839\rm MeV ≥ T≥ 210 \rm MeV. To investigate the potential in a quark-gluon plasma with light u,d and s quarks we utilize Nf=2+1 ASQTAD lattices with ml=ms/20 by the HotQCD collaboration, giving access to temperatures between 286 \rm MeV ≥ T≥ 148\rm MeV. The real part of the potential exhibits a clean transition from a linear, confining behavior in the hadronic phase to a Debye screened form above deconfinement. Interestingly its values lie close to the color singlet free energies in Coulomb gauge at all temperatures. We estimate the imaginary part on quenched lattices and find that it is of the same order of magnitude as in hard-thermal loop perturbation theory. From among all the systematic checks carried out in our study, we discuss explicitly the dependence of the result on the default model and the number of datapoints.