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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.

21 votes

Why can't a single photon produce an electron-positron pair?

Other way to see why this is impossible is to look at inverse process: why annihilating positron and electron can't give up only one photon? Imagine these two particles at rest near each other (or loo …
Stipe Galić's user avatar