Silver-110’s decay reveals a promising path to measure antineutrino mass. New data could reshape future neutrino studies.

Still, the results so far are impressive. In 2022, KATRIN set a new upper limit for the neutrino mass. With the latest measurements, that limit has been cut in half—now at just 0.45 electron volts.

References [1] Penning-trap measurement of the Q value of electron capture in 163Ho for the determination of the electron neutrino mass. Nature Physics (2024).

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