# Improved test of Lorentz invariance in electrodynamics using rotating cryogenic sapphire oscillators

@article{Stanwix2006ImprovedTO, title={Improved test of Lorentz invariance in electrodynamics using rotating cryogenic sapphire oscillators}, author={Paul L. Stanwix and Michael E. Tobar and Peter Wolf and Clayton R. Locke and Eugene N. Ivanov}, journal={Physical Review D}, year={2006}, volume={74}, pages={081101} }

We present new results from our test of Lorentz invariance, which compares two orthogonal cryogenic sapphire microwave oscillators rotating in the lab. We have now acquired over 1 year of data, allowing us to avoid the short data set approximation (less than 1 year) that assumes no cancellation occurs between the {kappa}-tilde{sub e-} and {kappa}-tilde{sub o+} parameters from the photon sector of the standard model extension. Thus, we are able to place independent limits on all eight {kappa…

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