paper

Cosmological Constraints on Lorentz Violation in Electrodynamics

arXiv:hep-ph/0111026 · doi:10.1103/PhysRevLett.87.251304

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}.

4 pages, accepted for publication in Physical Review Letters

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