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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