UHE neutrino detection by a satellite-based air shower experiment

Ultra-High-Energy(UHE) neutrinos have not yet been detected because of the small interaction cross-section with the target matter. UHE neutrinos could be produced in astrophysical objects where UHE cosmic rays are accelerated and could also be expected in the top-down process such as the decay of SHR/topological defects. Extensive Air Showers (EASs) induced by neutrinos have a uniform Xmax distribution over atmospheric slant depth though that of hadronic EASs is limited between and . Assuming UHE neutrino fluxes, the detection efficiencies by satellite-based observation with a target mass of are estimated.