Thermal quarkonium physics in the pseudoscalar channel
Abstract
The pseudoscalar correlator is an ideal lattice probe for thermal modifications to quarkonium spectra, given that it is not compromised by a contribution from a large transport peak. We construct a perturbative spectral function incorporating resummed thermal effects around the threshold and vacuum asymptotics above the threshold, and compare the corresponding imaginary-time correlators with continuum-extrapolated lattice data for quenched SU(3) at several temperatures. Modest differences are observed, which may originate from non-perturbative mass shifts or renormalization factors, however no resonance peaks are needed for describing the quenched lattice data for charmonium at and above T ~ 1.1Tc ~ 350 MeV. For comparison, in the bottomonium case a good description of the lattice data is obtained with a spectral function containing a single thermally broadened resonance peak.
Keywords
Cite
@article{arxiv.1709.07612,
title = {Thermal quarkonium physics in the pseudoscalar channel},
author = {Y. Burnier and H. -T. Ding and O. Kaczmarek and A. -L. Kruse and M. Laine and H. Ohno and H. Sandmeyer},
journal= {arXiv preprint arXiv:1709.07612},
year = {2017}
}
Comments
28 pages. v2: published version