Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-05-28
Phys.Lett. B407 (1997) 39-44
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 3 eps figures, LaTeX
Scientific paper
10.1016/S0370-2693(97)00746-6
We study the retarded response function in scalar $\phi^4$-theory at finite temperature. We find that in the high-temperature limit the imaginary part of the self-energy is given by the classical theory to leading order in the coupling. In particular the plasmon damping rate is a purely classical effect to leading order, as shown by Aarts and Smit. The dominant contribution to Landau damping is given by the propagation of classical fields in a heat bath of non-interacting fields.
Buchmüller Wilfried
Jakovac Antal
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