Extra dimensions and Lorentz invariance violation
High Energy Physics - Phenomenology
2008-11-26 v4 Astrophysics
High Energy Physics - Theory
Abstract
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.
Cite
@article{arxiv.0704.0314,
title = {Extra dimensions and Lorentz invariance violation},
author = {Viktor Baukh and Alexander Zhuk and Tina Kahniashvili},
journal= {arXiv preprint arXiv:0704.0314},
year = {2008}
}
Comments
RevTex, 5 pages, references added and minor changes. Corrected typos in title