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T: Fachverband Teilchenphysik
T 2: Neutrino Physics I
T 2.8: Vortrag
Montag, 16. März 2026, 18:00–18:15, AudiMax
Measurement of Solar Neutrino Oscillation Parameters with the First JUNO Data — •Cristobal Morales Reveco1,2,3, Nurba Amanbek1,3, Tim Charisse1,3, Ze Chen1,3, Livia Ludhova1,3, Marco Malabarba1,3, Mariam Rifai1,2,3, Sahar Safari1,3, Ujwal Santhosh1,3, and Rosmarie Wirth1,3 — 1GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany — 2III. Physikalisches Institut B, RWTH Aachen University, 52062 Aachen, Germany — 3Institute of Physics and EC PRISMA+, Johannes Gutenberg Universität Mainz, Mainz, Germany
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kt liquid scintillator detector experiment located in the Jiangmen region, China. It is situated at an optimal distance of 52.5 km from multiple nuclear reactor cores and is designed for precision measurements of neutrino oscillation parameters and the determination of the neutrino mass ordering (NMO). In December 2024, construction was completed, and commissioning began by fully filling the detector with water. In February 2025, the water in the inner detector started to be replaced with liquid scintillator, a process that continued until the end of August of the same year. This talk presents results from 59.1 days of data, achieving a world-leading measurement of the solar oscillation parameters. It will focus on the analysis strategy: signal event and data-driven background selections, the estimation of residual backgrounds, uncertainties, and the fit strategy used to extract the solar oscillation parameters.
Keywords: Neutrino; Oscillation Parameters; JUNO