We report on a search for electro-magnetic and/or hadronic showers (cascades) induced by high-energy neutrinos in the data collected with the AMANDA II detector during the year 2000. The observed event rates are consistent with the expectations for atmospheric neutrinos and muons. We place upper limits on a diffuse flux of extraterrestrial electron, tau and muon neutrinos. A flux of neutrinos with a spectrum φα E-2 which consists of an equal mix of all flavors, is limited to E2 φ(E) = 8.6 × 10-7 GeV cm-2s-1sr-1 at a 90% confidence level for a neutrino energy range 50 TeV to 5 PeV. We present bounds for specific extraterrestrial neutrino flux predictions. Several of these models are ruled out.
|Original language||English (US)|
|Number of pages||12|
|State||Published - Nov 2004|
Bibliographical noteFunding Information:
We acknowledge the support of the following agencies: National Science Foundation––Office of Polar Programs, National Science Foundation––Physics Division, University of Wisconsin Alumni Research Foundation, Department of Energy, and National Energy Research Scientific Computing Center (supported by the Office of Energy Research of the Department of Energy), UC-Irvine AENEAS Supercomputer Facility, USA; Swedish Research Council, Swedish Polar Research Secretariat, and Knut and Alice Wallenberg Foundation, Sweden; German Ministry for Education and Research, Deutsche Forschungsgemeinschaft (DFG), Germany; Fund for Scientific Research (FNRS-FWO), Flanders Institute to encourage scientific and technological research in industry (IWT), and Belgian Federal Office for Scientific, Technical and Cultural affairs (OSTC), Belgium; IT acknowledges support from Fundación Venezolana de Promoción al Investigador (FVPI), Venezuela; DFC acknowledges the support of the NSF CAREER program.
- Neutrino astronomy
- Neutrino telescopes