Neutrino Mass and the KATRIN Experiment

Recently, the Karlsruhe Tritium Neutrino Experiment (KATRIN) set a new upper limit on the combined mass of all three known neutrino types — no more than 8.8 x 10⁻⁷ times the mass of an electron, doubling the precision of past estimates.

  • Neutrinos are elusive subatomic particles that interact so weakly with matter that they can travel through a light-year’s worth of metal virtually undisturbed, making them incredibly hard to detect.
  • KATRIN observes tritium decay and measures the energy of emitted electrons — indirectly revealing the neutrino mass.
  • Unlike cosmological models or neutrinoless double beta decay experiments, KATRIN’s result is ....
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