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VOLUME 72 (2000) | ISSUE 3 | PAGE 145
Possible signature of low scale gravity in ultra high energy cosmic rays
PACS: 04.80.Cc, 98.70.-f
We show that the existence of low scale gravity at TeV scale could lead to a direct production of photons with energy above 1023 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.