Lorentz symmetry violation at Planck scale, cosmology and superluminal particles

Details Lorentz symmetry violation at Planck scale, cosmology and superluminal particles Lorentz symmetry violation at Planck scale, cosmology and superluminal particles

1997-12-31

arxiv.org/abs/physics/9712056v2

Physics

General Physics

3 pages, LaTeX, uses sprocl.sty; talk given at COSMO-97, Ambleside September 15-19 1997. Revised version with a misprint corre

Scientific paper

Although Lorentz symmetry has been tested at low energy with extremely good accuracy, its validity at very high energy is much less well established. If Lorentz symmetry violation (LSV) is energy-dependent (e.g. $\propto E^2$), it can be of order 1 at Planck scale and undetectable at GeV scale or below. Similarly, superluminal particles with positive mass and energy (superbradyons) can exist and be the ultimate building blocks of matter. We discuss a few cosmological consequences of such a scenario, as well as possible experimental tests.

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