Detecting Ultra High Energy Neutrinos by Upward Tau Airshowers and Gamma Flashes
τ Air-showers are the best trace of rarest Ultra High Energy neutrinos UHE υτ, υ¯τ and υ¯e at PeV and higher energy. τ Air-showers may generate billion times amplified signals by their secondaries. Horizontal amplified τ air-showers by υτ N and UHE υ¯e e at PeV emerging from mountain chain might be the most power-full imprint. Upward UHE υτ N interaction on Earth crust at horizontal edge and from below, their consequent UHE τ air-showers beaming toward high mountains should flash γ,μ, X and optical detectors on the top. Upward τ air-shower may hit nearby satellite flashing them by short, hard, diluted γ-burst at the edge of Gamma Ray Observatory BATSE threshold. We identify these events with recent (1994) discovered upward Terrestrial Gamma Flashes (TGF) and we probed their UHE τ — UHE υτ origin. From these TGF data approximated UHE υτ flux and sever lower bound are derived. Partial TGF Galactic signature is also manifest within known 47 TGF events at ≃ 2 ⊙· 10−3probability. Well known X — γ — TeV active galactic and extragalactic sources have found probable counterpart in TGF arrival directions. Detection of elusive UHE υτ seem finally achieved.
KeywordsAtmospheric Neutrino Light Neutrino Extragalactic Source Neutrino Burst Nadir Angle
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- 3.D. Fargion, A. Salis: In: Proc. 25th ICRC, Salt Lake City, 1997, HE-4-6 (1997) pp. 153-156Google Scholar
- 8.D. Fargion, A. Aiello, R. Conversano In: 26th ICRC, Salt Lake City, USA, 1999, HE.6.1.10 (1999) pp. 396-398Google Scholar
- 9.D. Fargion: ‘Discovering Ultra High Energy Neutrinos by Horizontal and Upward tau Air-Showers: First Evidences in Terrestrial Gamma Flashes’, Ap.J. (submitted), astro-ph/0002453 (2000)Google Scholar
- 10.Y.N. Hayashida et al.: In: Proc. 26th ICRC, Salt Lake City, 1999, OG.1.3.04 (1999) pp. 256-259Google Scholar