Electroweak phase transition enhanced by a CP-violating dark sector

TL;DR

This paper investigates how a CP-violating dark sector within a 3-Higgs doublet model can enhance the electroweak phase transition, emphasizing the significance of higher loop calculations and identifying parameter regions compatible with experimental constraints.

Contribution

It introduces a 3-Higgs doublet model with a CP-violating dark sector and analyzes the electroweak phase transition at higher loop orders, highlighting regions with a strong first-order transition.

Findings

Higher loop calculations are crucial for accurate EWPT analysis.

Identified parameter regions with first-order EWPT consistent with experimental bounds.

Dark matter relic density constraints are satisfied in the identified regions.

Abstract

Within a well-motivated 3-Higgs doublet model, in which the extended dark sector accommodates CP violation, we analyse the electroweak phase transition (EWPT) at one- and two-loop order. We show the importance of higher loop calculations in EWPT analyses and identify the regions of the parameter space of our model where EWPT is of first order while in agreement with all theoretical and experimental bounds, including Dark Matter relic density and direct and indirect searches.