WP 2 - Low energy neutrinos as messengers

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JUNO is a large liquid scintillator neutrino experiment. It is under construction in Southern China. German groups contributed substantially to the development and production of the hardware. The underground laboratory was excavated. The detector is now being assembled. We expect first data in 2024. With this project we want to participate in the scientific harvest of the JUNO project. We want to finalize the analysis strategies, apply them to the data, and contribute to the scientific results. JUNO has a versatile science program built on two pillars: precision measurements of neutrino oscillations and geo- and astrophysical topics using neutrinos as messengers. JUNO has a good chance to become the decisive experiment on the question of the hierarchy of the neutrino states, one of the most pressing questions in neutrino physics. It will measure oscillation parameters from reactor neutrinos more precisely than ever before, test the unitarity of the PMNS matrix and look for non-standard behavior of neutrinos. It will measure neutrinos out of the core, the mantle, and the crust of the earth with unprecedented rates, study solar neutrinos, and neutrinos produced by cosmic rays in our atmosphere. It has a very high potential in analyzing the collapse of a nearby supernova and it will probably be the first experiment to detect the diffuse emission of neutrinos from supernovae in the whole universe.