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| Report/Journal Article | PUBDB-2017-08246 |
;
1997
North-Holland Publ.
Amsterdam
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Please use a persistent id in citations: doi:10.1016/S0370-2693(97)00746-6
Report No.: DESY-97-083; hep-ph/9705452
Abstract: We study the retarded response function in scalar φ 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.
Keyword(s): phi**n model: 4 ; cross section: energy dependence ; finite temperature ; propagator: renormalization ; statistical mechanics: classical ; energy loss: plasmon ; high temperature expansion
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