Observability of Earth-skimming Ultra-high Energy Neutrinos

Details Observability of Earth-skimming Ultra-high Energy Neutrinos Observability of Earth-skimming Ultra-high Energy Neutrinos

2001-05-08

arxiv.org/abs/hep-ph/0105067v2

Phys.Rev.Lett. 88 (2002) 161102

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.88.161102

Neutrinos with energies above 10^8 GeV are expected from cosmic ray interactions with the microwave background and are predicted in many speculative models. Such energetic neutrinos are difficult to detect, as they are shadowed by the Earth, but rarely interact in the atmosphere. Here we propose a novel detection strategy: Earth-skimming neutrinos convert to charged leptons that escape the Earth, and these leptons are detected in ground level fluorescence detectors. With the existing HiRes detector, neutrinos from some proposed sources are marginally detectable, and improvements of two orders of magnitude are possible at the proposed Telescope Array.

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