Title : Detection of Cascades induced by Atmospheric Neutrinos in the 79-string IceCube Detector

Abstract :

Neutrino production and oscillation physics can be studied by utilizing a very high flux of atmospheric neutrinos. In a Cherenkov medium such as ice, atmospheric muon neutrino interactions create tracks while cascades are produced by atmospheric electron neutrinos and by neutral current interactions of all flavors. We present the first detection of atmospheric neutrino-induced cascades at energies between 50 GeV and 1 TeV, using the DeepCore fiducial array in the IceCube neutrino detector. Using 281 days of data, 1029 events are observed of which 59% are predicted to be cascades. The observations and future analyses are discussed in this presentation.