High-T QCD and dimensional reduction: measuring the Debye mass
arXiv:hep-lat/9709024 · doi:10.1016/S0920-5632(97)00788-3
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.
3 pages, Latex, 3 figures. Presented by K. Rummukainen at Lattice '97