Speaker
Description
Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose experiment located in southern China. The detector is designed with 20-kton liquid scintillator and has started collecting full liquid scintillator data since August 2025. The main physics goal of JUNO is to determine the neutrino mass ordering (NMO) via a precise measurement of the reactor neutrino oscillation spectrum. Atmospheric neutrino oscillation measurement in JUNO can potentially provide independent sensitivity to NMO and increase JUNO’s total sensitivity in a joint analysis. This talk reports the recent progress made by JUNO towards a measurement of atmospheric neutrino oscillations, which has never been achieved by a liquid scintillator experiment before. The first observations of atmospheric neutrinos in JUNO and studies of atmospheric neutrinos' energy and direction reconstruction, event identification and background rejection are discussed.
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