The Electron EDM and EDMs in Two-Higgs-Doublet Models

TL;DR

This paper discusses how electric dipole moments (EDMs) serve as sensitive probes for new physics beyond the Standard Model, especially in constraining CP-violating phases in Two-Higgs-Doublet models, by addressing theoretical uncertainties and model-independent extraction methods.

Contribution

It provides a model-independent method to extract the electron EDM from heavy paramagnetic systems and applies this to constrain CP-violating phases in Two-Higgs-Doublet models.

Findings

Constraints on CP-violating phases in 2HDMs derived from EDM measurements.

Inclusion of subleading contributions improves electron EDM extraction.

Theoretical uncertainties are conservatively estimated to ensure robust bounds.

Abstract

Electric dipole moments constitute highly sensitive probes for CP-violating effects beyond the Standard Model. The upper limits obtained in various precision experiments can therefore be used to strongly restrict new physics models. However, relating the experimental information to parameters of a specific model is complicated by the presence of various sources for EDMs as well as large theory uncertainties in some of the relevant matrix elements. In this article, we address both issues for the EDMs of heavy paramagnetic systems, where it is possible to include subleading contributions, thereby model-independently extracting the electron EDM. We furthermore use expressions for the presently phenomenologically relevant EDMs with conservative estimates for the theoretical uncertainties to place constraints on CP-violating phases in the context of Two-Higgs-Doublet models.