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

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.

References in corpus (19)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Big-Bang Nucleosynthesis
• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• The oblique parameters in multi-Higgs-doublet models
• Basis-independent methods for the two-Higgs-doublet model III: The CP-conserving limit, custodial symmetry, and the oblique parameters S, T, U
• Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
• Natural Dark Matter from an Unnatural Higgs Boson and New Colored Particles at the TeV Scale
• Strong First Order Electroweak Phase Transition in the CP-Conserving 2HDM Revisited
• Search for neutral Higgs bosons of the minimal supersymmetric standard model in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• A Twisted Custodial Symmetry in the Two-Higgs-Doublet Model
• Search for a CP-odd Higgs boson decaying to $Zh$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Echoes of the Electroweak Phase Transition: Discovering a second Higgs doublet through $A_0\to H_{0}Z$
• Fingerprinting the extended Higgs sector using one-loop corrected Higgs boson couplings and future precision measurements
• On the gauge dependence of vacuum transitions at finite temperature
• The Higgs Vacuum Uplifted: Revisiting the Electroweak Phase Transition with a Second Higgs Doublet
• Dimensional reduction of the Standard Model coupled to a new singlet scalar field
• Electroweak Baryogenesis with Lepton Flavor Violation
• Supersymmetric and non-supersymmetric models without catastrophic Goldstone bosons