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Measurement of Atmospheric Neutrino Oscillations with IceCube

ContributorsIceCube Collaboration
Published inPhysical review letters, vol. 111, no. 08, 081801
Publication date2013
Abstract

We present the first statistically significant detection of neutrino oscillations in the high-energy regime (>20  GeV) from an analysis of IceCube Neutrino Observatory data collected in 2010 and 2011. This measurement is made possible by the low-energy threshold of the DeepCore detector (∼20  GeV) and benefits from the use of the IceCube detector as a veto against cosmic-ray-induced muon background. The oscillation signal was detected within a low-energy muon neutrino sample (20–100 GeV) extracted from data collected by DeepCore. A high-energy muon neutrino sample (100 GeV–10 TeV) was extracted from IceCube data to constrain systematic uncertainties. The disappearance of low-energy upward-going muon neutrinos was observed, and the nonoscillation hypothesis is rejected with more than 5σ significance. In a two-neutrino flavor formalism, our data are best described by the atmospheric neutrino oscillation parameters |Δm232|=(2.3+0.6−0.5)×10−3  eV2 and sin2(2θ23)>0.93, and maximum mixing is favored.

Citation (ISO format)
IceCube Collaboration. Measurement of Atmospheric Neutrino Oscillations with IceCube. In: Physical review letters, 2013, vol. 111, n° 08, p. 081801. doi: 10.1103/PhysRevLett.111.081801
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