Distinguishing axions from generic light scalars using EDM and fifth-force experiments

Abstract

We derive electric dipole moment (EDM) constraints on possible new macroscopic time reversal and parity violating (TVPV) spin-dependent forces. These constraints are compared to those derived from direct searches in fifth-force experiments and from combining laboratory searches with astrophysical bounds on stellar energy loss. For axion-mediated TVPV spin-dependent forces, EDM constraints dominate over fifth-force limits by several orders of magnitude. However, we show that for a generic light scalar, unrelated to the strong CP problem, present bounds from direct fifth- force searches are more stringent than those inferred from EDM limits, for the interaction ranges explored by fifth-force experiments. Thus, correlating observations in EDM and fifth-force experiments could help distinguish axions from more generic light scalar scenarios.

28 pages, 5 figures, references added, presentation clarified in some places

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Cited by in corpus (25)

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• Loop-induced direct detection signatures from CP-violating scalar mediators
• Lab-based limits on the Carroll-Field-Jackiw Lorentz-violating electrodynamics
• Tests of Fundamental Quantum Mechanics and Dark Interactions with Low Energy Neutrons -- Extended Version
• Particle Physics at the European Spallation Source
• Constraining interactions mediated by axion-like particles with ultracold neutrons
• Anomalies in ${}^8$Be nuclear transitions and $(g-2{)}_{e,\mu }$: towards a minimal combined explanation
• New constraints on axion-mediated P,T-violating interaction from electric dipole moments of diamagnetic atoms
• Spin-dependent exotic interactions
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• Search for exotic short-range interactions using paramagnetic insulators
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• Axion Bounds from Quantum Technology
• Constraining CP violating nucleon-nucleon long range interactions in diatomic eEDM searches
• Imperfect Axion Precludes the Domain Wall Problem
• Parity and Time Reversal Invariance Violation in Neutron-Nucleus Scattering