Proposed astrophysical test of Lorentz invariance

Details Proposed astrophysical test of Lorentz invariance Proposed astrophysical test of Lorentz invariance

1999-12-29

arxiv.org/abs/gr-qc/9912117v2

Phys.Rev.D61:103002,2000

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Typos corrected. Version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.61.103002

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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