JUNO Unveils Early Clues in the Neutrino Flavor Mystery
JUNO, a 20-ktonne underground detector in China, released two months of data showing precise measurements of how neutrinos change flavor and offering clues about their masses; the detector observes electron antineutrinos from nearby reactors via inverse beta decay and aims to resolve the neutrino-mass hierarchy, with cross-checks expected from Hyper-Kamiokande and DUNE in the coming decade; findings published in Nature.