Erlangen 2026 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 37: Neutrino Astronomy II

T 37.8: Vortrag

Dienstag, 17. März 2026, 18:00–18:15, KS H C

Integration of the NEUT Neutrino Interaction Model into the KM3NeT/ORCA Simulation Framework and Evaluation of Its Impact on Oscillation Analyses — •Frederik Andersen, Thomas Eberl, and Rodrigo Gracia-Ruiz for the KM3NET-ERLANGEN collaboration — Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany

The KM3NeT/ORCA neutrino telescope is currently under construction in the Mediterranean Sea. It is optimised to detect atmospheric neutrinos with energies up to 100 GeV. To this end a three dimensional grid of photomultiplier tubes detects Cherenkov radiation induced by particles that result from neutrino interactions with seawater. The data recorded by the experiment is analysed by comparing to detailed Monte-Carlo simulations which implement state-of-the-art knowledge on secondary particle production and detection processes. As a first step, so-called neutrino event generator codes employ different approximations to simulate the distribution of final-state particles produced in neutrino interactions. Differences in neutrino generators can introduce biases in the interpretation of the experimental data, and lead to tensions in measurements performed by different experiments. In this talk we will present our results how using different neutrino event generators impacts KM3NeT/ORCA's scientific results by implementing an alternative simulation pipeline using NEUT, the neutrino event generator developed by Super-Kamiokande, and compare its results to the default KM3NeT pipeline employing GENIE as event generator.

Keywords: Neutrino Oscillations; Neutrino event generators; Simulation; GENIE; NEUT