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Ultra High Energy Tau Neutrinos and Fluorescence Detectors: A Phenomenological Approach

Authors
  • Guzzo, M.
  • Moura, C.
Type
Published Article
Publication Date
Nov 25, 2005
Submission Date
Apr 28, 2005
Identifiers
DOI: 10.1016/j.astropartphys.2006.03.002
arXiv ID: hep-ph/0504270
Source
arXiv
License
Unknown
External links

Abstract

We investigate the possibility of detecting ultra-high energy cosmic tau-neutrinos by means of a process involving a double extensive air shower, the so-called Double-Bang Phenomenon. In this process a primary tau-neutrino interacts with an atmospheric quark creating a hadronic extensive air shower that contains a tau which subsequently decays creating a second extensive air shower. The number of these events strongly depends on the cross section and on the flux of ultra-high energy tau-neutrinos arriving at the Earth's atmosphere. We estimate the potential of optical detectors to observe Double-Bang events induced by tau-neutrinos with energies of about 1 EeV whose detection may confirm the maximal mixing observed in the atmospheric neutrinos also for ultra-high energy neutrinos, and give information on the neutrino flux and cross-section. For neutrino-nucleon Standard Model extrapolated cross-section and thick source model of flux (MPR), we estimate an event rate of 0.48/yr for an observatory with two fluorescence detectors with 90% efficiency in the neutrino energy range 0.5 < E_nu < 5 EeV.

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