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Massive $ϕ^4$ Model at Finite Temperature -- Resummayion Procedure la RG Improvement --

Hisao Nakkagawa·Hiroshi Yokota
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Abstract

In this paper the phase structure of the massive $λϕ^4$ model at finite temperature ($T \neq 0$) is investigated by applying a resummation method inspired by the renormalization-group (RG) improvement to the one-loop effective potential. The resummation method a la RG-improvement is shown to work quite succesfully by resumming up systematically large correction-terms of $O(λT/μ)$ and of $O(λ(T/μ)^2)$. The temperature-dependent phase transition of the model is shown to proceed through the second order transition. The critical exponents are determined analytically and are compared with those in other analyses.

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Hisao Nakkagawa, Hiroshi Yokota. 1999-02-22. Massive $ϕ^4$ Model at Finite Temperature -- Resummayion Procedure la RG Improvement --. https://arxiv.org/abs/hep-ph/9902422

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