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arXiv · 1410.2546

Static quark-antiquark potential in the quark-gluon plasma from lattice QCD

Yannis Burnier·Olaf Kaczmarek·Alexander Rothkopf
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Abstract

We present a state-of-the-art determination of the complex valued static quark-antiquark potential at phenomenologically relevant temperatures around the deconfinement phase transition. Its values are obtained from non-perturbative lattice QCD simulations using spectral functions extracted via a novel Bayesian inference prescription. We find that the real part, both in a gluonic medium as well as in realistic QCD with light $u$, $d$ and $s$ quarks, lies close to the color singlet free energies in Coulomb gauge and shows Debye screening above the (pseudo) critical temperature $T_c$. The imaginary part is estimated in the gluonic medium, where we find that it is of the same order of magnitude as in hard-thermal loop resummed perturbation theory in the deconfined phase.

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Yannis Burnier, Olaf Kaczmarek, Alexander Rothkopf. 2014-10-09. Static quark-antiquark potential in the quark-gluon plasma from lattice QCD. https://doi.org/10.1103/physrevlett.114.082001

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