Recent Examples of antineutrino from the Web
One type of radioactivity, called beta decay, releases either a positron and a neutrino or an electron and an antineutrino.
That gas is what neutrinos — and antineutrinos, their counterpart just like matter and antimatter — hit in the detector, allowing scientists to see what occurs on the rare occasion the mysterious particles interact with atoms.
But the neutrino mixing matrix comes equipped with its own factor by which neutrinos and antineutrinos can violate CP symmetry.
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