Resummation Methods at Finite Temperature: The Tadpole Way

Abstract

We examine several resummation methods for computing higher order corrections to the finite temperature effective potential, in the context of a scalar ${\varphi }^4$ theory. We show by explicit calculation to four loops that dressing the propagator, not the vertex, of the one-loop tadpole correctly counts ``daisy'' and ``super-daisy'' diagrams.

Comments: 18 pages, LaTeX, CALT-68-1858, HUTP-93-A011, EFI-93-22