IF matter is being continually created from radiant energy in the Universe, so that the first step in the synthesis is a pair production of some sort, then one might expect equal amounts of matter and antimatter to result from a synthesis which employs equal numbers of elementary particles and antiparticles (probably electrons, positrons, neutrinos, and antineutrinos). The possible existence of antimatter is a common topic for speculation. The purpose of this note is to direct attention to what may be a close analogue to the evolution of ‘local pockets’ of matter and antimatter in the Universe.
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GRAY, G. Quasars and Antimatter. Nature 206, 175 (1965). https://doi.org/10.1038/206175a0
General Relativity and Gravitation (1971)