Thermal quarkonium physics in the pseudoscalar channel

Autor: Olaf Kaczmarek, Hauke Sandmeyer, Anna-Lena Kruse, Yannis Burnier, Mikko Laine, Hiroshi Ohno, Heng-Tong Ding
Rok vydání: 2017
Předmět:
Zdroj: Journal of High Energy Physics
Journal of High Energy Physics, Vol 2017, Iss 11, Pp 1-27 (2017)
Burnier, Yannis; Ding, H.-T.; Kaczmarek, O.; Kruse, A.-L.; Laine, Mikko Sakari; Ohno, H.; Sandmeyer, H. (2017). Thermal quarkonium physics in the pseudoscalar channel. Journal of High Energy Physics, 2017(11) Springer 10.1007/JHEP11(2017)206
ISSN: 1029-8479
DOI: 10.1007/jhep11(2017)206
Popis: 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.
Comment: 28 pages. v2: published version
Databáze: OpenAIRE