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arXiv · gr-qc/9912117

Proposed astrophysical test of Lorentz invariance

O. Bertolami·C. S. Carvalho
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Abstract

Working in the context of a Lorentz-violating extension of the standard model we show that estimates of Lorentz symmetry violation extracted from ultra-high energy cosmic rays beyond the Greisen-Kuzmin-Zatsepin (GZK) cutoff allow for setting bounds on parameters of that extension. Furthermore, we argue that a correlated measurement of the difference in the arrival time of gamma-ray photons and neutrinos emitted from active galactic nuclei or gamma-ray bursts may provide a signature of possible violation of Lorentz symmetry. We have found that this time delay is energy independent, however it has a dependence on the chirality of the particles involved. We also briefly discuss the known settings where the mechanism for spontaneous violation of Lorentz symmetry in the context of string/M-theory may take place.

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O. Bertolami, C. S. Carvalho. 2000-03-14. Proposed astrophysical test of Lorentz invariance. https://doi.org/10.1103/physrevd.61.103002

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