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.
Testing CPT and Lorentz Symmetry with Electrons and Positrons in Penning Traps
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We present a theoretical analysis of signals for CPT and Lorentz violation in g-2 and charge-to-mass-ratio experiments on electrons and positrons in Penning traps. Experiments measuring anomaly frequencies are found to be the most sensitive to CPT violation. We find that the conventional figure of merit for CPT breaking, involving the difference of the electron and positron g factors, is inappropriate in this context, and an alternative is introduced. Bounds of approximately one part in 10^{20} are attainable.
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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.