A QCD Debye mass in a broad temperature range
M. Laine, P. Schicho, Y. Schroder
TL;DR
This paper calculates the QCD Debye mass across a wide temperature range from 1 GeV to 10 TeV at 2-loop order, providing insights into screening effects in gauge plasmas relevant for cosmology.
Contribution
It introduces a detailed 2-loop calculation of the QCD Debye mass over a broad temperature spectrum, including quark mass threshold effects and finite-temperature loop identities.
Findings
QCD Debye mass determined from 1 GeV to 10 TeV
Smooth crossing of quark mass thresholds demonstrated
Finite-temperature massive loop identities clarified
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.
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