Abstract
Many astrophysical models predict a diffuse flux of high-energy neutrinos from active galactic nuclei and other extragalactic sources. At muon energies above 1 TeV, the upward-going muon flux induced by neutrinos from active galactic nuclei is expected to exceed the flux due to atmospheric neutrinos. We have performed a search for this astrophysical neutrino flux by looking for upward-going muons in the highest energy data sample from the Super-Kamiokande detector using 1679.6 live days of data. We found one extremely high energy upward-going muon event, compared with an expected atmospheric neutrino background of 0.46 ± 0.23 events. Using this result, we set an upper limit on the diffuse flux of upward-going muons due to neutrinos from astrophysical sources in the muon energy range 3.16-100 TeV.
Original language | English |
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Pages (from-to) | 206-215 |
Number of pages | 10 |
Journal | Astrophysical Journal |
Volume | 652 |
Issue number | 1 I |
DOIs | |
Publication status | Published - Nov 20 2006 |
Externally published | Yes |
Keywords
- Galaxies: active
- Gamma rays: bursts
- Neutrinos
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science