SUPERSYMMETRY. “An electron with a photon and a positron with an antiphoton are supersymmetric partners. They contain two neutrinos or two antineutrinos. In the annihilation reaction, mass as an amount of matter in a body cannot disappear. Neutrinos and antineutrinos only change their position. The mass of an electron and a positron goes over into the mass of a photon and an antiphoton.”
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