Göttingen 2012 – scientific programme
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T: Fachverband Teilchenphysik
T 110: Niederenergie-Neutrinophysik/Suche nach Dunkler Materie 5
T 110.10: Talk
Wednesday, February 29, 2012, 19:05–19:20, ZHG 102
Atmospheric νµ disappearance in the IceCube+DeepCore detector — •Juan Pablo Yanez and Rolf Nahnhauer — DESY, 15738 Zeuthen
Neutrino oscillations, a theoretical prediction outside the Standard Model, is now an accepted fact supported by a large amount of experimental data. However, because of the difficulties associated with the production and detection of neutrinos, even new precision experiments are restricted to limited statistics and to operate at a fixed baseline and/or energy. The DeepCore sub-array, enclosed in the IceCube Neutrino Observatory, is an optical water Cherenkov neutrino detector sensitive to neutrinos down to energies of O(10 GeV). It has a fiducial volume of 107 m3, in which ∼100,000 atmospheric neutrino events will be registered every year, with a baseline varying between 0 − 12,700 km. These unique characteristics make it suitable for oscillations measurements.
The work presented here attempts to observe the gradual disappearance of muon neutrinos as a function of the baseline, which is maximal for those crossing the whole Earth at E=25 GeV. The results shown are obtained using simulation. The analysis will be applied to the data acquired by the full detector, which started operations in 2011.