Hunting for CP-violating axionlike particle interactions

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.

v3: 6 pages, 3 figures. Published version

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• Axion Window on New Macroscopic Forces
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• Contribution of the Weinberg-type Operator to atomic and nuclear electric dipole moments
• Searching for exotic scalars at fusion reactors