Non-perturbative Debye mass in finite T QCD
K. Kajantie, M. Laine, J. Peisa, A. Rajantie, K. Rummukainen, M. Shaposhnikov
Abstract
Employing a non-perturbative gauge invariant definition of the Debye screening mass mD in the effective field theory approach to finite T QCD, we use 3d lattice simulations to determine the leading O(g2) and to estimate the next-to-leading O(g3) corrections to mD in the high temperature region. The O(g2) correction is large and modifies qualitatively the standard power-counting hierarchy picture of correlation lengths in high temperature QCD.
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