On the validity of perturbative studies of the electroweak phase transition in the Two Higgs Doublet model

Kainulainen, Kimmo; Keus, Venus; Niemi, Lauri; Rummukainen, Kari; Tenkanen, Tuomas Ville Ilmari; Vaskonen, Ville (2019). On the validity of perturbative studies of the electroweak phase transition in the Two Higgs Doublet model. Journal of High Energy Physics, 2019(6) Springer 10.1007/JHEP06(2019)075

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Making use of a dimensionally-reduced effective theory at high temperature, we perform a nonperturbative study of the electroweak phase transition in the Two Higgs Doublet model. We focus on two phenomenologically allowed points in the parameter space, carrying out dynamical lattice simulations to determine the equilibrium properties of the transition. We discuss the shortcomings of conventional perturbative approaches based on the resummed effective potential — regarding the insufficient handling of infrared resumma- tion but also the need to account for corrections beyond 1-loop order in the presence of large scalar couplings — and demonstrate that greater accuracy can be achieved with perturba- tive methods within the effective theory. We find that in the presence of very large scalar couplings, strong phase transitions cannot be reliably studied with any of the methods.

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:

Tenkanen, Tuomas Ville Ilmari

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

05 Nov 2019 10:10

Last Modified:

05 Nov 2019 10:10

Publisher DOI:

10.1007/JHEP06(2019)075

ArXiv ID:

1904.01329

BORIS DOI:

10.7892/boris.134334

URI:

https://boris.unibe.ch/id/eprint/134334

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