Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 104: Niederenergie-Neutrinophysik 6
T 104.9: Vortrag
Donnerstag, 7. März 2013, 18:50–19:05, WIL-C107
Atmospheric Neutrino Oscillations in IceCube-79 — •Andreas Groß and IceCube Collaboration — Technische Universität München
We present the results of an analysis of data collected by IceCube/DeepCore in 2010-2011 when operating in the 79 string configuration. This analysis results in the first significant detection of neutrino oscillations in a high-energy neutrino telescope. A low-energy muon neutrino sample (20 - 100 GeV) containing the oscillation signal was extracted from data collected by DeepCore. A high-energy muon neutrino sample (100 GeV - 10 TeV) was extracted from IceCube data in order to constrain the systematic uncertainties. The non-oscillation hypothesis was rejected with more than 5σ. We fitted the oscillation parameters Δ m232 and sin22 θ23 to these data samples. In a 2-flavor formalism we find Δ m232= (2.5±0.6)· 10−3 eV2 and sin22 θ23>0.92 while maximum mixing is favored. These results are in good agreement with the world average values.