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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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The Feynman diagram for Pair production

A "Feynman" diagram does not have a time axis. This is, in fact, what distinguishes "Feynman" diagrams from the diagrams used in other accounting similar schemes. Every interaction point in a Feynma …
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Is it possible to produce protons from vacuum polarization?

Except for the greater mass energy required, there is no major difference between how different charged particle-antiparticle pairs are produced by a strong electric field $\vec{E}$. The lowest-order …
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