We consider different renormalizable models of Lorentz invariance violation. We show that the limits on birefringence of the propagation of cosmic microwave background photons from the five year data of the Wilkinson Microwave Anisotropy Probe (WMAP) can be translated into a limit of Lorentz symmetry violation. The obtained limits on Lorentz invariance violation are stronger than other published limits. We also cast them in terms of limits on a birefringent effective photo mass and on a polarization dependence of the speed of light.
Physical Review D
- Pub Date:
- December 2008
- Background radiations;
- Lorentz and Poincare invariance;
- 5 pages, references and discussions added, results unchanged, accepted for publications in PRD