sciencehabit writes: Scientists working with a massive subterranean particle detector in Japan have directly observed a hoped-for phenomenon in which particles called muon neutrinos transform into others called electron neutrinos. In itself, that preliminary observation tells physicists nothing new about the relationship between matter and antimatter. However, the effect appears to be so large that it suggests future experiments now in the planning may have a far easier time spotting other phenomena. That includes a possible asymmetry between the behavior of neutrinos and antineutrinos that could explain why the universe evolved to contain so much matter and so little antimatter.
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