Searching for axion forces with precision precession in storage rings

Abstract

We consider different types of storage rings as precision probes of axion-mediated monopole-dipole forces. We show that current and planned experiments aiming to measure magnetic and electric dipole moments of protons, muons and electrons very precisely may explore new parts of the parameter space beyond existing laboratory bounds and, in some cases, beyond astrophysical constraints. Remarkably, a light axion coupled to muons may explain the FNAL/BNL $(g-2{)}_{\mu }$ anomaly as an environmental effect -- the coherent axion field generated by the earth nucleons induces an extra contribution to the anomalous precession frequency of the muon explaining the discrepancy with respect to the SM prediction.

arXiv comment12 pages, 3 figures. v2: references added, version accepted in PRD

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• Spin-dependent exotic interactions
• Leading bounds on micro- to picometer fifth forces from neutron star cooling
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Searching for axion forces with spin precession in atoms and molecules
• Measuring axion gradients with photon interferometry (MAGPI)
• New Technologies for Axion and Dark Photon Searches
• Axion Bounds from Quantum Technology
• Constraints on monopole-dipole potential from the tests of gravity
• Solar neutrinos and leptonic spin forces
• Muon g-2, Long-Range Muon Spin Force, and Neutrino Oscillations
• Lepton $g-2$ and $W$-boson mass anomalies in the DFSZ axion model
• Berry phase in axion physics, SM global structure, and generalized symmetries
• Axion Window on New Macroscopic Forces
• Testing the Fifth Force on Lepton Spins through Neutrino Oscillations