Possible Signature of Low Scale Gravity in Ultra High Energy Cosmic Rays

Abstract

We show that the existence of low scale gravity at TeV scale could lead to a direct production of photons with energy above 10 eV due to annihilation of ultra high energy neutrinos on relic massive neutrinos of the galactic halo. Air showers initialized in the terrestrial atmosphere by these ultra energetic photons could be collected in near future by the new generation of cosmic rays experiments. Recently it was proposed [1] that the space is 4+n dimensional, with the Standard Model particles living on a brane. While the weakly, electromagnetically, and strongly interacting particles are confined to the brane in 4 dimensions, gravity can propagate also in extra n dimensions. This approach allows to save the gauge hierarchy problem by introducing a single fundamental mass scale (string scale) Ms of the order of TeV. The usual Planck scale MPl = 1/ √ GN ≃ 1.22 ·1019GeV is related to the new mass scale Ms by Gauss’s law:

Cite this paper

@inproceedings{Konoplich2008PossibleSO, title={Possible Signature of Low Scale Gravity in Ultra High Energy Cosmic Rays}, author={R . V . Konoplich and S . G . Rubin}, year={2008} }