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

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http://hdl.handle.net/10138/309435

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Kainulainen , K , Keus , V , Niemi , L , Rummukainen , K , Tenkanen , T V I & Vaskonen , V 2019 , ' On the validity of perturbative studies of the electroweak phase transition in the Two Higgs Doublet model ' , Journal of High Energy Physics , vol. 2019 , no. 6 , 075 . https://doi.org/10.1007/JHEP06(2019)075

Title: On the validity of perturbative studies of the electroweak phase transition in the Two Higgs Doublet model
Author: Kainulainen, Kimmo; Keus, Venus; Niemi, Lauri; Rummukainen, Kari; Tenkanen, Tuomas V. I.; Vaskonen, Ville
Contributor: University of Helsinki, University of Jyväskylä
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Particle Physics and Astrophysics
University of Helsinki, University of Bern
Date: 2019-06-17
Language: eng
Number of pages: 39
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
URI: http://hdl.handle.net/10138/309435
Abstract: 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 resummation 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 perturbative 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.
Subject: 114 Physical sciences
EFFECTIVE FIELD THEORIES
THERMAL FIELD THEORY
COSMOLOGY OF THEORIES BEYOND THE SM
LATTICE QUANTUM FIELD THEORY
TEMPERATURE DIMENSIONAL REDUCTION
BARYON ASYMMETRY
STANDARD MODEL
CP-VIOLATION
PP COLLISIONS
3D PHYSICS
BOSON
BARYOGENESIS
LATTICE
SECTOR
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