Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 62: Neutrino-Astronomie II

T 62.3: Talk

Wednesday, March 27, 2019, 16:35–16:50, S14

Improving the description of the astrophysical muon-neutrino spectrum with 9 years of IceCube data — •Joeran Stettner, Christian Haack, René Reimann, and Christopher Wiebusch for the IceCube collaboration — Otto-Blumenthal Strasse, 52074 Aachen

The IceCube Neutrino Observatory has observed a flux of high-energy astrophysical neutrinos, typically modeled as unbroken powerlaw energy spectrum. This observation has been confirmed in independent channels, i.e. different event selections and event topologies. However, the best-fitting description of the astrophysical astrophysical component differs between these analyses and it is an unsolved question where the difference comes from. Here, we present an update of the analysis of through-going muon-neutrinos from the Northern Hemisphere. It was extended to nine years of data and models beyond the unbroken powerlaw are explored to describe the astrophysical component. Additionally, an approach is presented to extract the flux-normalization in bins of true neutrino energy to enable an easy comparison to other measurements and theoretical predictions.