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T: Fachverband Teilchenphysik

T 101: Hochenergie-Neutrinophysik 3

T 101.7: Talk

Thursday, March 27, 2014, 18:20–18:35, P3

Measurement of neutrino oscillations with IceCube DeepCore — •Juan Pablo Yanez for the IceCube collaboration — DESY, Zeuthen

We present the most recent results on neutrino oscillations obtained with the completed IceCube detector. IceCube is a cubic kilometer ice Cherenkov high-energy neutrino detector. DeepCore, a region of denser instrumentation in the lower center of IceCube, permits the detection of atmospheric neutrinos with energies as low as 10 GeV.

The disappearance pattern of muon neutrinos was measured by analyzing the shape of their 2-dimensional energy-zenith angle distribution. The study benefits from the development of tools to recover the direction of the muon and total visible energy of the neutrino, allowing reliable reconstruction of events at the detector’s threshold. The main background is atmospheric muons, which are removed using the IceCube strings of detectors that surround the DeepCore sub-array as a veto. A sample of high-quality neutrino events that start within DeepCore is selected, with the aim of diminishing the impact of uncertainties from the ice properties and other detection effects. Future steps and projections are also discussed.