PoS - Proceedings of Science
Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Oral presentation
In-medium static quark potential from spectral functions on realistic HISQ ensembles
G. Parkar*, D. Bala, O. Kaczmarek, R. Larsen, S. Mukherjee, P. Petreczky, A. Rothkopf and J. Weber
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Pre-published on: May 16, 2022
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Abstract
We explore the interactions between a quark anti-quark pair in a thermal medium based on lattice QCD ensembles with $N_f = 2+1$ dynamical HISQ flavors. Our dataset spans the phenomenologically relevant temperature range between T=140MeV-2GeV based on lattice sizes
$N_\tau=10,12$ and $16$, with an aspect ratio of $N_\sigma/N_\tau=4$.
The peak position $\Omega$ and the width $\Gamma$ of the spectral function of Wilson-line correlators in Coulomb gauge is computed. We assess the information content in the correlation functions and deploy three complementary strategies to reconstruct spectral information: model fits, Pad\'e approximation and the Bayesian BR method. Limitations of each approach are carefully assessed.
DOI: https://doi.org/10.22323/1.396.0239
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