Thermal phase transition with full 2-loop effective potential

Laine, Mikko Sakari; Meyer, Manuel; Nardini, Germano (2017). Thermal phase transition with full 2-loop effective potential. Nuclear physics. B, 920, pp. 565-600. Elsevier 10.1016/j.nuclphysb.2017.04.023

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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 Tc, 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Laine, Mikko Sakari; Meyer, Manuel and Nardini, Germano

Subjects:

500 Science > 530 Physics

ISSN:

0550-3213

Publisher:

Elsevier

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

03 Nov 2017 09:24

Last Modified:

03 Nov 2017 09:24

Publisher DOI:

10.1016/j.nuclphysb.2017.04.023

BORIS DOI:

10.7892/boris.102354

URI:

https://boris.unibe.ch/id/eprint/102354

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