Probing CP Violation in Dark Sector through the Electron Electric Dipole Moment

Abstract

The Two Higgs Doublet Model (2HDM) stands as a promising framework for exploring physics beyond the Standard Model (SM). Within this context, we explore the possibility that the two Higgs doublets may serve as a window into CP-violating dark sectors, neutral under the SM gauge groups. Specifically, our focus is on investigating the electric dipole moment (EDM) of the electron, generated solely by CP violation in the dark sector. We present a general formula for the electron EDM, without specifying the structure of the dark sectors, and discuss the current constraints on various dark sector models. It is noteworthy that even in the case of a CP-conserving 2HDM, the resulting electron EDM is capable of reaching the current experimental limit, with CP violation arising exclusively from the dark sectors. Furthermore, we introduce a heavy dark sector (HDS) approximation for the analytic calculation of the EDM, assuming that the dark sector particles are much heavier than the physical states in the 2HDM. This approximation yields simplified analytic results that are consistent with the full numerical calculations.

46 pages, 8 figures, v2: some references and comments are added

References in corpus (9)

• A new bound on the electron's electric dipole moment
• Electric Dipole Moments in the MSSM Reloaded
• The Inert Dark Matter
• Gauge-independent $\overline{MS}$ renormalization in the 2HDM
• Aligned CP-violating Higgs sector canceling the electric dipole moment
• Higgs-boson visible and invisible constraints on hidden sectors
• Systematic and statistical uncertainty evaluation of the HfF${}^{+}$ electron electric dipole moment experiment
• A Simple Model of Dark Matter and CP Violation
• Restricting the parameter space of Type-II Two Higgs Doublet Models with CP violation

Cited by in corpus (1)

• Testing CP-violation in a Heavy Higgs Sector at CLIC