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Hi.I know that beta-minus decay involves a neutron converting to an electron (beta) and an anti-electron-neutrino; in fact a down quark becomes an up quark and the W‾ boson provides momentum/energy to the beta and the anti-neutrino, but, how does the electron and anti-neutrino originate?; they were not inside the neutron.
I have studied physics at university. Someone must know or is it one of those questions that is not answerable as yet?