Detecting Ultra High Energy Neutrinos by Upward Tau Airshowers and Gamma Flashes

Details Detecting Ultra High Energy Neutrinos by Upward Tau Airshowers and Gamma Flashes Detecting Ultra High Energy Neutrinos by Upward Tau Airshowers and Gamma Flashes

2000-05-22

arxiv.org/abs/astro-ph/0005439v1

Sources and Detection of Dark Matter and Dark Energy in the Universe. February 23-25, 2000, California, USA. Edited by David B

Astronomy and Astrophysics

Astrophysics

8 pages,4 Figs, DARK 2000 Conference in UCLA

Scientific paper

Tau Air-showers are the best trace of rarest Ultra High Energy neutrinos UHE $\nu_{\tau}$, $\bar\nu_{\tau}$ and $\bar{\nu}_e$ at PeV and higher energy. $\tau$ Air-showers may generate billion times amplified signals by their secondaries . Horizontal amplified $\tau$ air-showers by $\nu_{\tau} N$ and UHE $\bar\nu_{e} e$ at PeV emerging from mountain chain might be the most power-full imprint. Upward UHE $\nu_{\tau} N$ interaction on Earth crust at horizontal edge and from below, their consequent UHE $\tau$ air-showers beaming toward high mountains should flash $\gamma$,$\mu$,X and optical detectors on the top. Upward $\tau$ air-shower may hit nearby satellite flashing them by short, hard, diluted $\gamma-$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 $\tau$ - UHE $\nu_\tau$ origin. From these TGF data approximated UHE $\nu_\tau$ flux and $\Delta m_{\nu_\mu \nu_\tau}$ sever lower bound are derived. Partial TGF Galactic signature is also manifest within known 47 TGF events clustered within three degrees from the Galactic plane at ${\simeq 2\cdot 10^{-3}}$probability. Well known $X-\gamma-\mathrm{TeV}$ active galactic and extragalactic sources have found probable counterpart in TGF arrival directions. Detection of elusive UHE $\nu_\tau$ seem finally achieved.

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