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arXiv · 1810.02230

Realistic in-medium heavy-quark potential from high statistics lattice QCD simulations

Peter Petreczky·Alexander Rothkopf·Johannes Weber
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Abstract

We present our first results on a direct computation of the complex in-medium heavy quark potential from realistic lattice QCD simulations. Ensembles with $N_τ=12$ from the HotQCD and TUMQCD collaboration offer unprecedented high statistics, those with $N_τ=16$ unprecedented time resolution, making possible a robust extraction of the real part from the spectral functions of Wilson line correlators. To this end we deploy a combination of a Bayesian reconstruction (BR method), as well as a Padé-like approximation. We corroborate findings made on less realistic lattices that ${\rm Re}[V]$ smoothly transitions from a confining to a screened behavior at high temperatures and its values lie close to the color singlet free energies. A finite value of the ${\rm Im}[V]$ is observed in the quark-gluon-plasma phase.

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Peter Petreczky, Alexander Rothkopf, Johannes Weber. 2018-10-04. Realistic in-medium heavy-quark potential from high statistics lattice QCD simulations. https://doi.org/10.1016/j.nuclphysa.2018.10.012

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