A QCD Debye mass in a broad temperature range

Authors :: Laine, M.
Schicho, P.
Schroder, Y.
Source :: Phys. Rev. D 101, 023532 (2020)
Publication Year :: 2019
Abstract: The Debye mass sets a scale for the screening of static charges and the scattering of fast charges within a gauge plasma. Inspired by its potential cosmological applications, we determine a QCD Debye mass at 2-loop order in a broad temperature range (1 GeV ... 10 TeV), demonstrating how quark mass thresholds get smoothly crossed. Along the way, integration-by-parts identities pertinent to massive loops at finite temperature are illuminated.<br />Comment: 18 pages. v2: minor clarifications