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Type: Artigo de periódico
Title: Ultra high energy tau-neutrinos and fluorescence detectors: A phenomenological approach
Author: Guzzo, MM
Moura, CA
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 y(-1) for an observatory with two fluorescence detectors with 90% efficiency in the neutrino energy range 0.5 < E-v < 5 EeV. (c) 2006 Elsevier B.V. All rights reserved.
Subject: UHECR
Auger observatory
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.astropartphys.2006.03.002
Date Issue: 2006
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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