The Gluon Propagator at High Temperature: Screening, Improvement and Non-Zero Momenta
Abstract
We study the gluon propagator and the singlet potential in Landau gauge in the deconfined phase of SU(2) lattice gauge theory, using both the standard Wilson action and a tree-level Symanzik improved action. From the long-distance behavior of correlation functions of temporal and spatial components of the gauge fields we extract electric (m_e) and magnetic (m_m) screening masses. For the magnetic mass we find m_m(T) = 0.456(6) g^2(T) T. The electric mass can be described by a next-to leading order ansatz, obtained from one loop resummed perturbation theory. However, the best description is given by m_e(T) = \sqrt{1.70(2)} g(T) T. The electric screening mass thus is different from its lowest order perturbative prediction even for temperatures as high as T \sim 10^4 T_c.
Keywords
Cite
@article{arxiv.hep-lat/9710033,
title = {The Gluon Propagator at High Temperature: Screening, Improvement and Non-Zero Momenta},
author = {U. M. Heller and F. Karsch and J. Rank},
journal= {arXiv preprint arXiv:hep-lat/9710033},
year = {2009}
}
Comments
29 pages, LaTeX2e File, 11 eps figures