Measurement of Atmospheric Neutrino Oscillations with IceCube - INSPIRE

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Measurement of Atmospheric Neutrino Oscillations with IceCube

IceCube

Collaboration

May 16, 2013

6 pages

Published in:

Phys.Rev.Lett. 111 (2013) 8, 081801

Published: Aug 19, 2013

e-Print:

1305.3909 [hep-ex]

DOI:

10.1103/PhysRevLett.111.081801

PDG:

\Delta

{}^{2}_{32}

Experiments:

ICECUBE

View in:

ADS Abstract Service

reference search116 citations

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Abstract: (APS)

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 |Δm322|=(2.3-0.5+0.6)×10-3 eV2 and sin⁡2(2θ23)>0.93, and maximum mixing is favored.

Note:

6 pages, 4 figures, submitted to PRL

14.60.Lm
14.60.Pq
95.55.Vj
95.85.Ry
neutrino: oscillation
neutrino: atmosphere
muon: background
muon: cosmic radiation
neutrino: mixing angle
neutrino: mass difference

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