# Lorentz violation and Crab synchrotron emission: a new constraint far beyond the Planck scale

@inproceedings{Jacobson2002LorentzVA, title={Lorentz violation and Crab synchrotron emission: a new constraint far beyond the Planck scale}, author={Ted Jacobson and Stefano Liberati and David M. Mattingly}, year={2002} }

The structure of spacetime at the Planck scale may lead to a breakdown of Lorentz invariance at high energies in the form of non-linear dispersion relations for fundamental particles. We show that observations of synchrotron emission from the Crab nebula constrain the energy scale EQG of subluminal Lorentz violation in the electron dispersion relation at order O(E/EQG) to EQG > 4.5×10 27 GeV. This is eight orders of magnitude larger than the Planck mass, and is an improvement of nine orders of…

## 52 Citations

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