Electric Dipole Moments, New Forces and Dark Matter

TL;DR

This paper explores how new CP-violating interactions linked to dark matter theories can be tested through electric dipole moment experiments, potentially revealing new physics beyond the Standard Model.

Contribution

It analyzes the implications of CP violation in anomaly-canceling dark matter theories and predicts experimental signatures accessible to current EDM measurements.

Findings

Large CP-violating phases could be fully probed by EDM experiments.

Constraints on dark matter relic density set upper bounds on symmetry breaking scales.

Electric dipole moments provide a sensitive test for new physics beyond the Standard Model.

Abstract

New sources of CP violation beyond the Standard Model are crucial to explain the baryon asymmetry in the Universe. We discuss the impact of new CP violating interactions in theories where a dark matter candidate is predicted by the cancellation of gauge anomalies. In these theories, the constraint on the dark matter relic density implies an upper bound on the new symmetry breaking scale from which all new states acquire their masses. We investigate in detail the predictions for electric dipole moments and show that if the relevant CP-violating phase is large, experiments such as the ACME collaboration will be able to fully probe the theory.