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Proceedings Paper

Ultrahigh-energy neutrino at GZK energy: Z-WW showering in dark halo and tau airshowers emerging from the Earth
Author(s): Daniele Fargion
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Paper Abstract

Relic neutrino nur light masses clustering in Galactic and Local Hot Dark Halos act as a beam dump calorimeter. Ultra High Energy nu, above ZeV, born by AGNs, GRBs at cosmic edges, overcoming the Greisen, Zatsepin, Kuzmin (GZK) cut-off, may hit near Z resonance and WW-ZZ channels energies: their showering into nucleons and gamma Ultra High Cosmic Ray (UHECR) fit observed data . Any tiny neutrino mass splitting may reflect into a twin bump at highest GZK energy cut-off. The lighter the neutrino masses the higher the Z-Showering cut-off. The Z or WW,ZZ showering might explain a peculiar clustering in observed UHECR spectra at 1019, 2x1019, 4x1019 eV found recently by AGASA. Coincidence of clustered UHECR with highest gamma BLac sources, originated either by neutral and charged particles (Q=0,+1,-1) is well tuned to Z-Showering Scenario. Additional prompt TeVs signals occur offering a natural solution of growing Infrared-TeV cut-off paradoxes related to distant TeV BLac sources and a GRB at TeV energy. Electromagnetic Cascades tail may explain correlation found between GeV-EGRET Sources and UHECR. Such UHE v Astrophysics might trace near GZK energy into Horizontal Tau Air-Showers originated by the UHE vτ Earth-Skimming in wide Corona Earth Crust around the observer; their consequent τ escape and decay upward in flight . These Upward and Horizontal τ Air-Showers UPTAUS, HORTAUS, monitor huge volumes from high mountains as well as observing from planes, balloons and satellites. HORTAUS from mountains observe corona masses at UHE v EeVs energies comparable to few km3, while from satellites at orbit altitudes, at GZK energies Enu≥ 1019 eV, their corresponding Horizontal Corona Masses may even exceed 150 km3. The expected event rate may exceed a dozen of event a year in Z-WW Showering model from satellite.

Paper Details

Date Published: 3 March 2003
PDF: 13 pages
Proc. SPIE 4858, Particle Astrophysics Instrumentation, (3 March 2003); doi: 10.1117/12.457958
Show Author Affiliations
Daniele Fargion, Univ. degli Studi di Roma La Sapienza (Italy)
Istituto Nazionale di Fisica Nucleare (Italy)


Published in SPIE Proceedings Vol. 4858:
Particle Astrophysics Instrumentation
Peter W. Gorham, Editor(s)

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