Göttingen 2025 – scientific programme

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T: Fachverband Teilchenphysik

T 99: Methods in Astroparticle Physics IV

T 99.5: Talk

Friday, April 4, 2025, 10:00–10:15, VG 3.101

Reconstruction of atmospheric neutrino events in JUNO — •Milo Charavet, Rosmarie Wirth, Mikhail Smirnov, Caren Hagner, and Daniel Bick — Hamburg University, Hamburg, Germany

The ordering of the neutrino masses is one of the fundamental open questions in the field of neutrino physics. The Jiangmen Underground Neutrino Observatory (JUNO) is a multipurpose liquid scintillator-based experiment (LS) with a target mass of 20 kt. It aims to determine the neutrino mass ordering (NMO) with at least 3σ significance, through a measurement of the oscillation pattern of reactor neutrinos over 53 km baseline. While reactor neutrinos are the main source of sensitivity to NMO at JUNO, atmospheric neutrino oscillation can provide independent sensitivity, and enhance its overall sensitivity in the combined analysis. As one of the largest LS detectors, JUNO might be able to measure with high precision the atmospheric neutrino events and their oscillation parameters. However, accurately reconstructing atmospheric neutrinos in such a large liquid scintillator detector is a significant challenge. This talk presents reconstruction methods to analyze these atmospheric neutrino events.

Keywords: atmospheric neutrinos; JUNO