Limit on Lorentz and CPT Violation of the Proton Using a Hydrogen Maser
D. F. Phillips, M. A. Humphrey, E. M. Mattison, R. E. Stoner, R. F C. Vessot, R. L. Walsworth
Abstract
We present a new measurement constraining Lorentz and CPT violation of the proton using a hydrogen maser double resonance technique. A search for hydrogen Zeeman frequency variations with a period of the sidereal day (23.93 h) sets a clean limit on violation of Lorentz and CPT symmetry of the proton at the 10-27 GeV level.
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