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Search for neutrino-induced cascades with five years of AMANDA data

Journal article published in 2011 by Cp de los Heros, Cp Pérez de los Heros, Rasha Abbasi, Yasser Abdou, Tareq Abu-Zayyad, A. van Overloop, O. Actis, J. Luenemann, J. Adams, Ja A. Aguilar, M. Ahlers, K. Andeen, L. Kopke, J. Auffenberg, M. Baker and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We report on the search for electromagnetic and hadronic showers ("cascades") produced by a diffuse flux of extraterrestrial neutrinos in the AMANDA neutrino telescope. Data for this analysis were recorded during 1001 days of detector livetime in the years 2000-2004. The observed event rates are consistent with the background expectation from atmospheric neutrinos and muons. An upper limit is derived for the diffuse flux of neutrinos of all flavors assuming a flavor ratio of νe:νμ: ντ = 1:1:1 at the detection site. The all-flavor flux of neutrinos with an energy spectrum Φ ∝ E-2 is less than 5.0 × 10-7 GeV s-1 sr-1 cm-2 at a 90% C.L. Here, 90% of the simulated signal would fall within the energy range 40 TeV to 9 PeV. We discuss flux limits in the context of several specific models of extraterrestrial and prompt atmospheric neutrino production. © 2010 Elsevier B.V. All rights reserved.