Quantum Gravity Phenomenology and Lorentz Violation
arXiv:gr-qc/0404067 · doi:10.1007/3-540-26798-0_8
Abstract
If quantum gravity violates Lorentz symmetry, the prospects for observational guidance in understanding quantum gravity improve considerably. This article briefly reviews previous work on Lorentz violation (LV) and discusses aspects of the effective field theory framework for parametrizing LV effects. Current observational constraints on LV are then summarized, focusing on effects in QED at order E/M_Planck.
16 pages, Expanded version of a lecture by T. Jacobson, to be published in Particle Physics and the Universe, Proceedings of the 9th Adriatic Meeting, eds. J.Trampetic and J.Wess (Springer-Verlag, 2004)
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