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Searching for axion forces with precision precession in storage rings
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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.
Forward citations
Cited by 3 Pith papers
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First Constraint on Axion-Photon Coupling $g_{\gamma}$ from Neutron Star Observations
The paper derives a first bound on the dimensionless axion-photon coupling gγ from pulsar polarization data, reporting |gγ|<0.93 at 1σ for axion masses below 10^-11 eV, via a neutron-star-induced axion field.
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Testing the Fifth Force on Lepton Spins through Neutrino Oscillations
Neutrino oscillation data from solar, reactor, accelerator, and atmospheric experiments place new limits on a vector fifth force coupled to lepton spins and exclude it as an explanation of the muon g-2 anomaly.
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High Precision Fundamental Physics Experiments at JLab with Spin-transparent Storage Rings of Low-energy Polarized Electron Beams
A compact all-electric Figure-8 spin-transparent storage ring at JLab could directly measure the electron EDM at about 5.8e-30 ecm and detect axion-induced spin precession at 0.2 nHz, if one-day spin coherence holds.
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