Left-right symmetry and electric dipole moments. A global analysis

TL;DR

This paper conducts a comprehensive analysis of electric dipole moments within the minimal left-right symmetric model, distinguishing new contributions and assessing implications for T-violation in beta decay.

Contribution

It introduces a global fit approach to separate left-right electroweak and theta contributions, applicable beyond the specific model studied.

Findings

Current EDM bounds do not exclude observing T-violation in future beta decay experiments.

The global fit disentangles different sources of EDM contributions within the model.

The approach can be generalized to other particle physics models.

Abstract

We perform a global fit using results of searches for electric dipole moments (EDM) of diamagnetic systems within the context of the minimal left-right symmetric model. In this way, we disentangle the new "left-right" electroweak and $\bar{\theta}$ contributions that cannot be separated using a single EDM system. Although the fit is done for a specific model, the approach can be applied to any particle physics model. Finally, we revisit the constraint on the $D$ coefficient in $\beta$-decay and find that current EDM bounds do not preclude observation of this T-violating effect in a possible next generation $\beta$-decay experiment.