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arxiv: physics/0302093 · v1 · submitted 2003-02-26 · ⚛️ physics.class-ph · gr-qc· hep-ex· hep-ph· physics.gen-ph

A New Limit on Signals of Lorentz Violation in Electrodynamics

J. A. Lipa , J. A. Nissen , S. Wang , D. A. Stricker , D. Avaloff This is my paper
classification ⚛️ physics.class-ph gr-qchep-exhep-phphysics.gen-ph
keywords anisotropyboundlorentzapparatusaxisbeatcavity-stabilizedcombinations
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We describe the results of an experiment to test for spacetime anisotropy terms that might exist from Lorentz violations. The apparatus consists of a pair of cylindrical superconducting cavity-stabilized oscillators operating in the TM_{010} mode with one axis east-west and the other vertical. Spatial anisotropy is detected by monitoring the beat frequency at the sidereal rate and its first harmonic. We see no anisotropy to a part in 10^{13}. This puts a comparable bound on four linear combinations of parameters in the general Standard Model extension, and a weaker bound of <4 x 10^{-9} on three others.

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