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Reposted from
Laura Baudis
Neutrinos may or may not be shrinking, but this is a great new result from the KATRIN experiment: new direct upper limit on the (effective electron) neutrino mass of 0.45 eV (90% CL). This comes from precision measurements of tritium β-decays in a huge spectrometer: www.science.org/doi/10.1126/...
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