= Neutrino oscillation
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<Neutrino oscillation> is coherent conversion between <neutrino flavors>: different <mass eigenstates> acquire different propagation phases. It measures squared-<mass> differences and mixing, rather than an absolute <neutrino mass>. The <Super-Kamiokande atmospheric-neutrino experiment> tests path-dependent disappearance; the <Sudbury Neutrino Observatory> compares reactions with complementary <neutrino flavor> sensitivity. <Solar neutrino> propagation also requires matter effects; the <two-flavour vacuum survival model> is only an illustration.
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