Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 46: Neutrino Astronomy 2

T 46.7: Vortrag

Dienstag, 22. März 2022, 17:45–18:00, T-H31

Improving Astrophysical Muon-Neutrino Measurements with New Energy Estimators in IceCube — •Philipp Fürst, Jakob Böttcher, Erik Ganster, Jonas Hellrung, Georg Schwefer, Roman Suveyzdis, and Christopher Wiebusch for the IceCube collaboration — RWTH Aachen University - Physics Institute III B, Aachen, Germany

The IceCube Neutrino Observatory is measuring a diffuse astrophysical neutrino flux with a spectral shape compatible with a single power law at Tev to PeV energies. With neutrinos conveying information directly from their source, their spectral shape is closely connected to open questions about the acceleration and propagation of the hadronic component of cosmic rays. While hints for spectral features beyond a single power law exist, spectral resolution in the muon-neutrino detection channel is strongly tied to the achievable energy resolution. We present new methods of energy estimation based on machine learning methods and estimate the expected sensitivity gain for model hypotheses beyond the single power law, exploring the possibility to distinguish different spectral shapes in the future.