Hunting for CP-violating axionlike particle interactions

TL;DR

This paper investigates how axion-like particles (ALPs) could induce CP-violating effects detectable through electric dipole moments (EDMs), providing a systematic theoretical framework and evaluating potential experimental sensitivities.

Contribution

It classifies CP-violating invariants in ALP EFT and calculates EDM contributions up to two-loop order, highlighting experimental prospects.

Findings

EDMs are highly sensitive to CP-violating ALP interactions

Systematic classification of CP-violating invariants in ALP EFT

Evaluation of EDM effects up to two-loop order

Abstract

The impact of axion-like particles (ALPs) on the search of permanent electric dipole moments (EDMs) of molecules, atoms, nuclei and nucleons is systematically investigated. We classify first the full set of CP-violating Jarlskog invariants emerging in the ALP effective field theory (EFT) containing operators up to dimension-5. Then, we evaluate the leading short-distance effects to the EDMs up to two-loop order. The high sensitivity of EDMs to CP-violating ALP interactions is emphasised exploiting both the current and projected experimental sensitivities.