Assertion: electron neutrino | /r/CapableOf | reabsorb virtual boson
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text: [gamma] can take place: in the first Feynman vertex a muon converts into a muon neutrino by radiating a virtual W boson, which emits a photon by inner bremsstrahlung; then, the muon neutrino converts to an electron neutrino via the neutrino mixing and the electron neutrino reabsorbs the virtual boson at the end of the loop in the second Feynman vertex, forming an outgoing electron.