Journal
NUCLEAR PHYSICS B
Volume 920, Issue -, Pages 565-600Publisher
ELSEVIER
DOI: 10.1016/j.nuclphysb.2017.04.023
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Funding
- Swiss National Science Foundation (SNF) [200020-168988]
- Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence Origin and Structure of the Universe
- Swiss National Science Foundation (SNF) [200020_168988] Funding Source: Swiss National Science Foundation (SNF)
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Theories with extended Higgs sectors constructed in view of cosmological ramifications (gravitational wave signal, baryogenesis, dark matter) are often faced with conflicting requirements for their couplings; in particular those influencing the strength of a phase transition may be large. Large couplings compromise perturbative studies, as well as the high-temperature expansion that is invoked in dimensionally reduced lattice investigations. With the example of the inert doublet extension of the Standard Model (IDM), we show how a resummed 2-loop effective potential can be computed without a high-T expansion, and use the result to scrutinize its accuracy. With the exception of T-c, which is sensitive to contributions from heavy modes, the high-T expansion is found to perform well. 2-loop corrections weaken the transition in IDM, but they are moderate, whereby a strong transition remains an option. (C) 2017 The Author(s). Published by Elsevier B.V.
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