On the spontaneous breaking of Lorentz invariance

Details On the spontaneous breaking of Lorentz invariance On the spontaneous breaking of Lorentz invariance

2000-01-28

arxiv.org/abs/gr-qc/0001097v1

Nucl.Phys.Proc.Suppl. 88 (2000) 49-56

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, Latex (requires mprocl.sty file available at http://www.aei-potsdam.mpg.de/~cavaglia/qg99/proceedings.html). Invited

Scientific paper

10.1016/S0920-5632(00)00753-2

We show that estimates of the Lorentz symmetry violation extracted from ultra-high energy cosmic rays beyond the GZK cut-off set bounds on the parameters of a Lorentz-violating extension of the Standard Model. Moreover, we argue that correlated measurements 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 for a possible violation of the Lorentz symmetry. We find that this time delay is energy independent, but that it has a dependence on the chirality of the particles involved.

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