Gluon propagator at high temperature: Screening, improvement and nonzero momenta
- 1 February 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 57 (3) , 1438-1448
- https://doi.org/10.1103/physrevd.57.1438
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 (me) and magnetic (mm) screening masses. For the magnetic mass we find mm(T)=0.456(6)g2(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 me(T)=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∼104Tc.Keywords
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