Neutrinos and their small non-zero masses play a key role in cosmology and particle physics. The allowed range of the mass scale has now been narrowed down by the initial results of the international Karlsruhe Tritium Neutrino Experiment (KATRIN). The analysis of a first four-week measurement run in spring 2019 limits neutrino masses to less than approximately 1 eV, which is smaller by a factor of 2 compared to previous laboratory results based on multi-year campaigns. This demonstrates the huge potential of KATRIN in elucidating novel properties of neutrinos over the coming years.
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Source: Phys.org