Cosmological Constraints on Lorentz Violation in Electrodynamics
Alan Kostelecky, Matthew Mewes
Abstract
Infrared, optical, and ultraviolet spectropolarimetry of cosmological sources is used to constrain the pure electromagnetic sector of a general Lorentz-violating standard-model extension. The coefficients for Lorentz violation are bounded to less than 3x10-32.
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