[[Image:Bdecay.png|right|thumb|300px|The [[Feynman diagram]] for the beta decay of a neutron into a proton, electron, and electron antineutrino via an intermediate heavy W- boson]] | [[Image:Bdecay.png|right|thumb|300px|The [[Feynman diagram]] for the beta decay of a neutron into a proton, electron, and electron antineutrino via an intermediate heavy W- boson]] |