Static Quark-Antiquark Potential in the Quark-Gluon Plasma from Lattice QCD

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 nonperturbative 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.


Published in:
Physical Review Letters, 114, 8
Year:
2015
Publisher:
College Pk, American Physical Society
ISSN:
0031-9007
Laboratories:




 Record created 2015-05-29, last modified 2018-03-17


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