Physical Review Letters
We present constraints on violations of Lorentz invariance based on archival lunar laser-ranging (LLR) data. LLR measures the Earth-Moon separation by timing the round-trip travel of light between the two bodies and is currently accurate to the equivalent of a few centimeters (parts in 1011 of the total distance). By analyzing this LLR data under the standard-model extension (SME) framework, we derived six observational constraints on dimensionless SME parameters that describe potential Lorentz violation. We found no evidence for Lorentz violation at the 10-6 to 10-11 level in these parameters. This work constitutes the first LLR constraints on SME parameters.
© 2007 by the American Physical Society. The publisher's version of the article can be found at http://link.aps.org/doi/10.1103/PhysRevLett.99.241103.
J.B.R. Battat, J.F. Chandler, C.W. Stubbs, Phys. Rev. Lett. 99, 241103 (2007).