期刊
NUCLEAR PHYSICS B
卷 920, 期 -, 页码 565-600出版社
ELSEVIER
DOI: 10.1016/j.nuclphysb.2017.04.023
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资金
- 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)
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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