Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars

Abstract

We study the feasibility of strong first-order electroweak phase transition (EWPT) in a degenerate-scalar scenario of a complex singlet extension of the Standard Model, in which a mass of an additional scalar is nearly degenerate with that of the Higgs boson, 125 GeV. This scenario is known to provide an exquisite solution for circumventing constraints from dark matter direct detection experiments due to cancellations between two scattering amplitudes mediated by two scalars. In the analysis of EWPT, we employ two gauge-invariant calculation schemes on the scalar potential and two familiar resummation methods in evaluating one-loop (gauge dependent) effective potential. We point out that one of the conditions for the strong first-order EWPT is incompatible with the known suppression mechanism of a dark matter cross-section scattering off the nucleons. Nevertheless, we find that strong first-order EWPT is still possible in the degenerate-scalar scenario by dodging dark matter constraints differently.

arXiv comment17 pages, 3 figures

References in corpus (18)

• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• First Dark Matter Search Results from the XENON1T Experiment
• Electroweak baryogenesis
• The Effective Potential and First-Order Phase Transitions: Beyond Leading Order
• Electroweak Baryogenesis
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• Resummation in a Hot Scalar Field Theory
• Electroweak Phase Transition in Two Higgs Doublet Models
• Complex Scalar Singlet Dark Matter: Vacuum Stability and Phenomenology
• Quantum Transport and Electroweak Baryogenesis
• A cancellation mechanism for dark matter-nucleon interaction
• Recasting direct detection limits within micrOMEGAs and implication for non-standard Dark Matter scenarios
• CP Violation and Baryogenesis at the Electroweak Phase Transition
• Axial Currents from CKM Matrix CP Violation and Electroweak Baryogenesis
• Revisiting electroweak phase transition in the standard model with a real singlet scalar
• Probing pseudo-Goldstone dark matter at the LHC
• Self-interacting dark matter and cosmology of a light scalar mediator
• Magnetic mass effect on the sphaleron energy

Cited by in corpus (7)

• Combining thermal resummation and gauge invariance for electroweak phase transition
• Singlet extensions and W boson mass in the light of the CDF II result
• Discerning Singlet and Triplet scalars at the electroweak phase transition and Gravitational Wave
• A complex singlet extension of the Standard Model and Multi-critical Point Principle
• Suppression of Higgs Mixing by Quantum Zeno Effect
• CP-violating effects on gravitational waves in a complex singlet extension of the Standard Model with degenerate scalars
• Temperature effects on the $Z_2$ symmetry breaking in the scotogenic model