Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory

Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimming ν<sub>τ</sub> may interact in the Earth's crust and produce a τ lepton by means of charged-current interactions. The τ lep...

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Autores principales:	Badagnani, Daniel Omar, Dova, María Teresa, Gómez Albarracín, Flavia Alejandra, Hansen, Patricia María, Mariazzi, Analisa Gabriela, Moreno, Juan Cruz, Sciutto, Sergio Juan, Tarutina, Tatiana, Tueros, Matías Jorge, Wahlberg, Hernán Pablo, The Pierre Auger Collaboration
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2009
Materias:	Ciencias Exactas Física Physics Tau neutrino Diffuse flux Lepton
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125917
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125917
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Exactas Física Physics Tau neutrino Diffuse flux Lepton
spellingShingle	Ciencias Exactas Física Physics Tau neutrino Diffuse flux Lepton Badagnani, Daniel Omar Dova, María Teresa Gómez Albarracín, Flavia Alejandra Hansen, Patricia María Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Tarutina, Tatiana Tueros, Matías Jorge Wahlberg, Hernán Pablo The Pierre Auger Collaboration Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
topic_facet	Ciencias Exactas Física Physics Tau neutrino Diffuse flux Lepton
description	Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimming ν<sub>τ</sub> may interact in the Earth's crust and produce a τ lepton by means of charged-current interactions. The τ lepton may emerge from the Earth and decay in the atmosphere to produce a nearly horizontal shower with a typical signature, a persistent electromagnetic component even at very large atmospheric depths. The search procedure to select events induced by τ decays against the background of normal showers induced by cosmic rays is described. The method used to compute the exposure for a detector continuously growing with time is detailed. Systematic uncertainties in the exposure from the detector, the analysis, and the involved physics are discussed. No τ neutrino candidates have been found. For neutrinos in the energy range 2 × 10¹⁷ eV < E<sub>ν</sub> < 2 × 10¹⁹ eV, assuming a diffuse spectrum of the form E⁻²<sub>ν</sub>, data collected between 1 January 2004 and 30 April 2008 yield a 90% confidence-level upper limit of E²<sub>ν</sub>dN<sub>ν<sub>τ</sub></sub> / dE<sub>ν</sub> < 9 × 10⁻⁸ GeV cm⁻² s⁻¹ sr⁻¹.
format	Articulo Articulo
author	Badagnani, Daniel Omar Dova, María Teresa Gómez Albarracín, Flavia Alejandra Hansen, Patricia María Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Tarutina, Tatiana Tueros, Matías Jorge Wahlberg, Hernán Pablo The Pierre Auger Collaboration
author_facet	Badagnani, Daniel Omar Dova, María Teresa Gómez Albarracín, Flavia Alejandra Hansen, Patricia María Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Tarutina, Tatiana Tueros, Matías Jorge Wahlberg, Hernán Pablo The Pierre Auger Collaboration
author_sort	Badagnani, Daniel Omar
title	Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
title_short	Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
title_full	Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
title_fullStr	Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
title_full_unstemmed	Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory
title_sort	limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the pierre auger observatory
publishDate	2009
url	http://sedici.unlp.edu.ar/handle/10915/125917
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Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory

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