<ul><li>The Karlsruhe Tritium Neutrino experiment (KATRIN) has set the tightest upper limit on the mass of neutrinos at 0.45 electron volts (eV) at 90% confidence.</li><li>Neutrinos are particles that have extremely weak interactions with matter and come in three flavors: electron, muon, and tau.</li><li>By studying tritium beta decay, KATRIN researchers can indirectly measure the neutrino's mass.</li><li>The new limit is a significant improvement over previous results and provides insights into the nature of neutrinos beyond the Standard Model of particle physics.</li></ul>

KATRIN sets tighter limit on neutrino mass

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