Atmospheric Neutrino Oscillations in IceCube

Abstract

We present the results of an analysis of data collected by IceCube/DeepCore in 2010-2011 resulting 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 $5\sigma$. We fitted the oscillation parameters $\Delta m_{23}^2$ and ${\sin }^{2}2{\theta }_{23}$ to these data samples. In a 2-flavor formalism we find $\Delta m_{23}^2=(2.5\pm 0.6)\cdot 10^{-3}$ eV${}^2$ and ${\sin }^{2}2{\theta }_{23}>0.92$ while maximum mixing is favored. These results are in good agreement with the world average values.

3 pages, 4 figures, contribution to NOW 2012, to appear in Nucl. Phys. B (Proc. Suppl.)

References in corpus (4)

• Observation of electron-antineutrino disappearance at Daya Bay
• Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data
• Cosmic-Ray Proton and Helium Spectra from the First CREAM Flight
• Measurement of Atmospheric Neutrino Oscillations with the ANTARES Neutrino Telescope

Cited by in corpus (4)

• On the robustness of IceCube's bound on sterile neutrinos in the presence of non-standard interactions
• Open issues in neutrino astrophysics
• Neutrino astrophysics : recent advances and open issues
• Combined effect of NSI and SFP on solar electron neutrino oscillation