Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 15: Kosmische Strahlung 1

T 15.3: Talk

Monday, March 27, 2017, 17:15–17:30, H 3

Atmospheric Neutrino Flux Measurement using the IceCube/DeepCore detector — •Joakim Sandroos and Sebastian Böser for the IceCube collaboration — Staudingerweg 7, 55128 Mainz

Atmospheric neutrinos are one of the most readily available neutrino sources and while the spectrum has been studied in detail over the past decades, it is still associated with considerable uncertainty. Accurate knowledge of the flux is important for other measurements of atmospheric neutrino properties. We present the first steps toward a precision measurement of the atmospheric neutrino flux, using the DeepCore array of the IceCube neutrino detector, in the energy range from ~5 to ~500 GeV. We employ a Bayesian (D'Agostini) iterative unfolding approach in order to make the measurement independent from theoretical predictions, and will discuss the method in some detail. In this scenario about 500.000 simulated events are necessary in order to adequately describe the detector response and systematic impacts. Background subtraction is done in our unfolding. In the final analysis we must also consider systematic effects from several other sources such as ice properties, quantum efficiency of the optical modules and input from oscillation parameters.