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Pair production is the creation of an elementary particle and its antiparticle out of a neutral boson, typically a photon, but sometimes a gluon.

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Is it possible to flip the electric charge of elementary particles using a strong laser, the...

A laser will not flip the charge of a particle. That would violate the conservation of charge. It might flip the spin of a particle, but that is something very different and does not convert it into a …
Fred. Zwarts's user avatar