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arXiv · hep-lat/9709024

High-T QCD and dimensional reduction: measuring the Debye mass

K. Kajantie·M. Laine·J. Peisa·A. Rajantie·K. Rummukainen·M. Shaposhnikov
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Abstract

We study the high-temperature phase of SU(2) and SU(3) QCD using lattice simulations of an effective 3-dimensional SU(N) + adjoint Higgs -theory, obtained through dimensional reduction. We investigate the phase diagram of the 3D theory, and find that the high-T QCD phase corresponds to the metastable symmetric phase of the 3D theory. We measure the Debye screening mass m_D with gauge invariant operators; in particular we determine the O(g^2) and O(g^3) corrections to m_D. The corrections are seen to be large, modifying the standard power-counting hierarchy in high temperature QCD.

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K. Kajantie, M. Laine, J. Peisa, A. Rajantie, K. Rummukainen, M. Shaposhnikov. 1997-09-10. High-T QCD and dimensional reduction: measuring the Debye mass. https://doi.org/10.1016/s0920-5632(97)00788-3

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