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

Journal Article · Sun Oct 15 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.081101· OSTI ID:20871354

Stanwix, Paul L; Tobar, Michael E; Locke, Clayton R; Ivanov, Eugene N ^[1]; Wolf, Peter ^[2]

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1. University of Western Australia, School of Physics M013, 35 Stirling Hwy., Crawley 6009 WA (Australia)
2. LNE-SYRTE, Observatoire de Paris, 61 Av. de l'Observatoire, 75014 Paris (France)

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}-tilde{sub e-} and {kappa}-tilde{sub o+} parameters. Our result represents up to a factor of 10 improvement over previous nonrotating measurements (which independently constrained seven parameters) and is a slight improvement (except for {kappa}-tilde{sub e-}{sup ZZ}) over results from previous rotating experiments that assumed the short data set approximation. Also, an analysis in the Robertson-Mansouri-Sexl framework allows us to place a new limit on the isotropy parameter P{sub MM}={delta}-{beta}+(1/2) of 9.4(8.1)x10{sup -11}, an improvement of a factor of 2.

• OSTI ID: 20871354
• Journal Information: Physical Review. D, Particles Fields, Vol. 74, Issue 8; Other Information: DOI: 10.1103/PhysRevD.74.081101; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
APPROXIMATIONS
COMPARATIVE EVALUATIONS
CONSERVATION LAWS
CRYOGENICS
ELECTRODYNAMICS
ISOTROPY
LORENTZ INVARIANCE
MICROWAVE RADIATION
OSCILLATORS
PHOTONS
RELATIVITY THEORY
SAPPHIRE
STANDARD MODEL