Göttingen 2025 – scientific programme

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T: Fachverband Teilchenphysik

T 32: Neutrino Astronomy II

T 32.6: Talk

Tuesday, April 1, 2025, 17:30–17:45, VG 1.105

Unfolding the Electron Neutrino Diffuse Spectrum — •Lene van Rootselaar, Lucas Witthaus, and Pascal Gutjahr for the IceCube collaboration — Technische Universität Dortmund

The IceCube Neutrino Observatory, located at the geographic South Pole, is a cubic-kilometre detector designed to identify neutrinos across a wide energy range. It distinguishes between two main types of neutrino signatures: track events, caused by muons traversing the detector, and cascade events, primarily produced by Charged-Current (CC) interactions of electron neutrinos and Neutral-Current (NC) interactions of all neutrino flavours. By analysing cascade events, it becomes possible to assess a diffuse electron neutrino spectrum, provided the background from Neutral-Current tau and muon neutrino interactions is properly accounted for.

Current progress on the production of this electron neutrino spectrum will be presented. The method used for this analysis is unfolding. The analysis is based on a Monte Carlo cascade sample. Preliminary flux results will be shown and compared to theoretical models, alongside an overview of the preparatory steps leading to this approach.

Keywords: electron neutrino; diffuse flux; unfolding