2003/06/11 by Peter Wolf, P. Wolf, Wolf, P. +10
Physics and Astronomy · #Neutrino Physics Research #Noncommutative and Quantum Gravity Theories #Relativity and Gravitational Theory #astro-ph #gr-qc
paper · pdf · doi:10.48550/arxiv.gr-qc/0306047
6 pages, 2 figures, to appear in Proc. of the 2003 joint IEEE FCS/EFTF meeting, to appear in Proc. of the 2003 Rencontres de Moriond
arxiv created 2003/06/11 · arxiv updated 2009/11/30
The frequencies of a cryogenic sapphire oscillator and a hydrogen maser are compared to set new constraints on a possible violation of Lorentz invariance. We determine the variation of the oscillator frequency as a function of its orientation (Michelson-Morley test) and of its velocity (Kennedy-Thorndike test) with respect to a preferred frame candidate. We constrain the corresponding parameters of the Mansouri and Sexl test theory to δ- β+ 1/2 ≤ 3.4 × 10-9 and β- α- 1 ≤ 4.1 × 10-7 which is of the same order as the best previous result for the former and represents a 50 fold improvement for the latter. These results correspond to an improvement of our previously published limits [Wolf P. et al., Phys. Rev. Lett. \bf 90, 6, 060402, (2003)] by about a factor 2. We describe the changes of the experiment, and show the new data that lead to that improvement.