Exploring C P violation and vanishing electric dipole moment of the electron in a scale-invariant general 2HDM
Year: 2025
Type: article
Abstract: We investigate a scale-invariant general two-Higgs-doublet model with explicit C P violation. Using the Gildener-Weinberg method, we analyze the Higgs mass spectrum and couplings at the one-loop level, focusing on C P violation originating from both the Higgs potential and the Yukawa sector. We show that, due to the flatness condition, both C P -even and C P -odd mixings between the 125 GeV Higgs boson and the heavier Higgs states arise only radiatively. As a result, the Higgs couplings to gauge bosons and fermions remain Standard Model-like, in agreement with current LHC constraints. We also find that the magnitude of C P violation from the Higgs potential depends on the new complex Yukawa couplings and heavy Higgs masses, due to the flatness condition. In the case where only an additional top Yukawa coupling ( ρ t t ) is present, the electron electric dipole moment is directly proportional to Im ρ t t 2 . Furthermore, a nontrivial cancellation region can occur for a specific Higgs mass spectrum. We extend our analysis to scenarios with an additional complex electron Yukawa coupling, identifying the conditions under which the electron electric dipole moment is suppressed or vanishes.
DOI: 10.1103/hkbf-ddvq
Authors: Dang Bao Nhi Nguyen, Eibun Senaha
Institutions: Charles University, Van Lang University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4417200652