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

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

1997-09-10

arxiv.org/abs/hep-lat/9709024v1

Nucl.Phys.Proc.Suppl. 63 (1998) 418-420

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, Latex, 3 figures. Presented by K. Rummukainen at Lattice '97

Scientific paper

10.1016/S0920-5632(97)00788-3

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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