Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-27
JHEP Proc.: PRHEP-AHEP2003/042
Astronomy and Astrophysics
Astrophysics
13 pages, 7 figures,AHEP conference, Valencia, Spain 2003
Scientific paper
Ultra High Energy, UHE, Neutrino Astronomy should be soon tested looking toward the Earth. At present High Energy Neutrino Astronomy is searched by AMANDA, ANTARES underground detectors looking for its consequent unique muons secondary track. We suggest a higher energy Tau Neutrino Astronomy based on Horizontal and Upward Tau Air-Showers escaping from the Earth. These Tau air-showers greatly amplifies the single tau track by an abundant secondary tail (billions of electron pairs, gamma and tens of millions muon bundles) spread in huge areas (kilometer size) easily observable (even partially) from high mountains, balloon or satellite array detectors. Possible early evidence of such a New Neutrino UPTAUs or HORTAUs (Upward or Horizontal Tau Air-Showers) Astronomy may be already found in rare BATSE gamma records of brief up-going gamma showers named Terrestrial Gamma Flashes (TGF). The TGF features, energy and arrival clustering are well tuned to upward tau air-showers. Future confirmation of the Neutrino Tau Astronomy must be found in detectors as EUSO, seeking for Upward-Horizontal air-shower events: indeed even minimal, guaranteed, GZK neutrino fluxes may be observed if EUSO threshold reaches 10^{19} eV or lower energies by enlarging its telescope size
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