I understood why a single photon can't be released from the annihilation of an electron and positron and that the common cases are 2 and 3 photons. I have two thing's I'm unsure of:
why is the probability to let say 5 photons is less the let say 3? why is the probability go down as we increase the number of photons?
how come we can have 2 and 3 photon emissions and still conserve the energy. is the energy gap between singlet and triplet states in positron sufficient to produce more photons?
