Extra dimensions and Lorentz invariance violation

Details Extra dimensions and Lorentz invariance violation Extra dimensions and Lorentz invariance violation

2007-04-03

arxiv.org/abs/0704.0314v4

Phys.Rev.D76:027502,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex, 5 pages, references added and minor changes. Corrected typos in title

Scientific paper

10.1103/PhysRevD.76.027502

We consider effective model where photons interact with scalar field corresponding to conformal excitations of the internal space (geometrical moduli/gravexcitons). We demonstrate that this interaction results in a modified dispersion relation for photons, and consequently, the photon group velocity depends on the energy implying the propagation time delay effect. We suggest to use the experimental bounds of the time delay of gamma ray bursts (GRBs) photons propagation as an additional constrain for the gravexciton parameters.

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