Real-time contour propagator for high temperature dimensional reduction

Details Real-time contour propagator for high temperature dimensional reduction Real-time contour propagator for high temperature dimensional reduction

1997-09-19

arxiv.org/abs/hep-ph/9709401v1

Phys.Lett. B444 (1998) 463-468

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, Revtex

Scientific paper

10.1016/S0370-2693(98)01352-5

We discuss the extension of dimensional reduction in thermal field theory at high temperature to real-time correlation functions. It is shown that the perturbative corrections to the leading classical behavior of a scalar bosonic field theory are determined by an effective contour propagator. On the real-time-branch of the time-path contour the effective propagator is obtained by subtracting the classical propagator from the contour propagator of thermal field theory, whereas on the Euclidean branch it reduces to the non-static Matsubara propagator of standard dimensional reduction.

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