Test of Lorentz Invariance in Electrodynamics Using Rotating Cryogenic Sapphire Microwave Oscillators

Abstract

We present the first results from a rotating Michelson-Morley experiment that uses two orthogonally orientated cryogenic sapphire resonator-oscillators operating in whispering gallery modes near 10 GHz. The experiment is used to test for violations of Lorentz Invariance in the frame-work of the photon sector of the Standard Model Extension (SME), as well as the isotropy term of the Robertson-Mansouri-Sexl (RMS) framework. In the SME we set a new bound on the previously unmeasured ${\tilde{\kappa }}_{e-}^{ZZ}$ component of $2.1(5.7)\times 10^{-14}$, and set more stringent bounds by up to a factor of 7 on seven other components. In the RMS a more stringent bound of $-0.9(2.0)\times 10^{-10}$ on the isotropy parameter, $P_{MM}=\delta -\beta +1/2$ is set, which is more than a factor of 7 improvement. More detailed description of the experiment and calculations can be found in: hep-ph/0506200

Final published version, 4 pages, references added

References in corpus (12)

• Lorentz-Violating Extension of the Standard Model
• CPT Violation and the Standard Model
• Signals for Lorentz Violation in Electrodynamics
• Cosmological Constraints on Lorentz Violation in Electrodynamics
• Modern Michelson-Morley experiment using cryogenic optical resonators
• A New Limit on Signals of Lorentz Violation in Electrodynamics
• Tests of relativity using a microwave resonator
• Test of constancy of speed of light with rotating cryogenic optical resonators
• Improved Test of Lorentz Invariance in Electrodynamics
• Whispering Gallery Resonators and Tests of Lorentz Invariance
• New methods of testing Lorentz violation in electrodynamics
• Proposal for a New Michelson-Morley Experiment Using a Single Whispering Spherical Mode Resonator

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