I asked the Internet…
What are the physical mechanisms that cause the three-photon annihilation of an electron and a positron? Here is the answer: “The three-photon annihilation of an electron and a positron is caused by the need to observe the law of conservation of charge parity (C-parity) in quantum electrodynamics, when the spins of colliding particles are directed […]
Read more "I asked the Internet…"