UHE Cosmic Rays and Neutrinos Showering on Planet Edges

Abstract

Ultra High Energy (UHE) Cosmic Rays, UHECR, may graze high altitude atmosphere leading to horizontal upward air-showers. Also PeVs electron antineutrino hitting electron in atmosphere may air-shower at W boson resonant mass. On the other side ultra high energy muon and electron neutrinos may also lead, by UHE neutrinos mass state mixing, to the rise of a corresponding UHE Tau neutrino flavor; the consequent UHE tau neutrinos, via charge current interactions in matter, may create UHE taus at horizons (Earth skimming neutrinos or Hor-taus) whose escape in atmosphere and whose consequent decay in flight, may be later amplified by upward showering on terrestrial, planetary atmospheres. Indeed because of the finite terrestrial radius, its thin atmosphere size its dense crust, the UHE tau cannot extend much more than 360 kilometers in air, corresponding to an energy of about 7.2 EeV, near but below GZK cut-off ones; on the contrary Jupiter (or even Saturn) may offer a wider, less dense and thicker gaseous layer at the horizons where Tau may loose little energy, travel longer before decay and rise and shower at 4-6 10^{19} eV or ZeV extreme energy. Titan atmosphere may open a rare window of opportunity for Up-ward Taus at PeVs. Also solar atmosphere may play a role, but unfortunately tau-showers secondaries maybe are too noisy to be disentangled, while Jupiter atmosphere, or better, Saturn one, may offer a clearer imprint for GZK (and higher Z-Burst) Tau showering, well below the horizons edges.Comment: 8 pages, 16 Figures, CRIS 200

Signals of HE atmospheric muon decay in flight around the Sun's albedo versus astrophysical muon and tau neutrino traces in the Moon's shadow

“…Analogous arguments were extensively discussed in details for ν τ , ντ and νe produced inside the Earth crust and escaping as τ -airshowers, 11,12,[19][20][21] Here we briefly remind that at energies above 30÷60 TeV the Earth diameter, comparable to ∼ 10 10 cm water equivalent, starts to become opaque to UHE neutrinos. The smaller Moon diameter slant depth (being on average less dense of Earth) is ∼ 8•10 9 cm w.e., therefore the Moon begin to represent an opaque volume to UHEν at E ν > 2 PeV.…”

Cherenkov flashes and fluorescence flares on telescopes: New lights on UHECR spectroscopy while unveiling neutrinos astronomy

“…Rarest up-going Tau airshower may escape the Earth at far horizon, leading to up-going flashes. Guaranteed nearby CR (PeVs-EeVs) airshower Cherenkov lights, may also be observed by reflection from nearby hills or mountains (as in Magic or Veritas), or from the sea [6] mogeneity and isotropy in all energy range. Only photons, our best neutral courier in Astronomy, offered up to now a view of the Universe from lowest (radio) to highest (TeVs) energies.…”