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Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 38: Kosmische Strahlung II

T 38.3: Talk

Tuesday, March 26, 2019, 16:30–16:45, S13

Reconstruction of the cosmic-ray spectrum based on stopping muons in IceCube — •Sebastiano Ninfa — Technische Universität Dortmund

The IceCube-Observatory at the South Pole is primarily intended to detect neutrinos from extra-galactic sources, yet the vast majority of recorded events originates from air showers induced by cosmic rays interacting in the upper atmosphere. While in the context of neutrino astronomy these events have to be considered background, the data from the atmospheric muons can still be used to infer knowledge about the composition and energy spectrum of these cosmic rays.

In this work the cosmic-ray spectrum is reconstructed using a model-independent unfolding approach. The study is conducted on a specific subsample of events, containing only muons which stop inside the detector, since the energy of these events can easily be estimated considering the propagation length from generation to absorption, so that the muon range can be used as a proxy to reconstruct the energy spectrum.

In this talk I will give an overview over the analysis, focusing mainly on the methods employed.

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