Observation of an ultra-high-energy cosmic neutrino with KM3NeT - Nature
Briefly

The article discusses the detection of cosmic neutrinos produced in connection with cosmic rays, which can generate secondary particles decaying into neutrinos. The KM3NeT research project features two detectors, ARCA and ORCA, situated in the Mediterranean Sea to investigate these cosmic phenomena. The ARCA detector focuses on high-energy cosmic neutrinos, while the ORCA detector studies neutrino oscillations. Both detectors employ advanced optical technologies to identify various types of neutrino interactions, enhancing our understanding of these elusive particles and their origins.
The KM3NeT infrastructure, with its ARCA and ORCA detectors, is designed to study high-energy cosmic neutrinos and neutrino oscillations, optimizing detection through advanced technologies.
Cosmic neutrinos are generated either at cosmic-ray sources or along their propagation paths, often manifesting through interactions that produce secondary unstable particles decaying into neutrinos.
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