New indirect bounds on Lorentz violation in the photon sector
arXiv:0810.1446
Abstract
Direct laboratory bounds on the 9 nonbirefringent Lorentz-violating dimensionless parameters of modified-Maxwell theory range from the 10^{-7} level to the 10^{-16} level. The detection of air showers initiated by charged primaries (ultrahigh-energy cosmic-rays) and neutral primaries (TeV gamma-rays) allows us to obtain new indirect bounds ranging from the 10^{-15} level to the 10^{-19} level. Possible physics implications are briefly discussed.
Parallel talk at ICHEP08, Philadelphia, USA, July 2008. 4 pages, LaTeX, 2 eps figures. v3: references added
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