Two-loop effective potential, thermal resummation and first-order phase transitions: Beyond the high-temperature expansion

Koichi Funakubo; Eibun Senaha

doi:10.1103/physrevd.87.054003

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arXiv · 1210.1737

Two-loop effective potential, thermal resummation and first-order phase transitions: Beyond the high-temperature expansion

Koichi Funakubo·Eibun Senaha

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Abstract

We study a finite temperature two-loop resummed effective potential in the Abelian gauge theory. A tractable calculation scheme without using a high-temperature expansion is devised. We apply it to the Abelian-Higgs model and its extension to a minimal supersymmetric standard model-like model and study the thermal phase transition. It is shown that our scheme improves the previous results about 10% in the quantities relevant to the phase transition, and its impacts on bubble dynamics could be even more sizable. It still holds that the stop-stop-gluon sunset diagram enhances the strength of the first-order phase transition even without the high-temperature expansion.

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Koichi Funakubo, Eibun Senaha. 2013-02-27. Two-loop effective potential, thermal resummation and first-order phase transitions: Beyond the high-temperature expansion. https://doi.org/10.1103/physrevd.87.054003

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