Earth-skimming UHE Tau Neutrinos at the Fluorescence Detector of Pierre Auger Observatory

Details Earth-skimming UHE Tau Neutrinos at the Fluorescence Detector of Pierre Auger Observatory Earth-skimming UHE Tau Neutrinos at the Fluorescence Detector of Pierre Auger Observatory

2004-07-30

arxiv.org/abs/astro-ph/0407638v2

Astropart.Phys. 23 (2005) 65-77

Astronomy and Astrophysics

Astrophysics

26 pages, 13 figures, version accepted for publication on Astroparticle Physics

Scientific paper

10.1016/j.astropartphys.2004.11.

Ultra high energy neutrinos are produced by the interaction of hadronic cosmic rays with the cosmic radiation background. More exotic scenarios like topological defects or new hadrons predict even larger fluxes. In particular, Earth-skimming tau neutrinos could be detected by the Fluorescence Detector (FD) of Pierre Auger Observatory. A detailed evaluation of the expected number of events has been performed for a wide class of neutrino flux models. An updated computation of the neutrino-nucleon cross section and of the tau energy losses has been carried out. For the most optimistic theoretical models, about one Earth-skimming neutrino event is expected in several years at FD.

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