The phenomenology of electric dipole moments in models of scalar leptoquarks

TL;DR

This paper investigates how scalar leptoquark models induce electric dipole moments (EDMs), constraining CP violation through current and future experiments, and explores implications for models explaining B-physics anomalies.

Contribution

It provides a comprehensive analysis of EDM phenomenology in scalar leptoquark models, including effective field theory matching, current constraints, and future sensitivities, especially in relation to B-physics anomalies.

Findings

Current EDM limits strongly constrain CP-violating phases in leptoquark models.

Different EDM experiments collectively restrict various leptoquark couplings.

Future EDM measurements could significantly improve sensitivity to CP violation in these models.

Abstract

We study the phenomenology of electric dipole moments (EDMs) induced in various scalar leptoquark models. We consider generic leptoquark couplings to quarks and leptons and match to Standard Model effective field theory. After evolving the resulting operators to low energies, we connect to EDM experiments by using up-to-date hadronic, nuclear, and atomic matrix elements. We show that current experimental limits set strong constraints on the possible CP-violating phases in leptoquark models. Depending on the quarks and leptons involved in the interaction, the existing searches for EDMs of leptons, nucleons, atoms, and molecules all play a role in constraining the CP-violating couplings. We discuss the impact of hadronic and nuclear uncertainties as well as the sensitivities that can be achieved with future EDM experiments. Finally, we study the impact of EDM constraints on a specific leptoquark model that can explain the recent $B$-physics anomalies.