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| style="height:20px; width:300px; text-align:center;" |This '''Feynman diagram''' shows the [[Electromagnetic Interaction|electromagnetic interaction]] between two [[proton]]s via the virtual [[photon]].
| style="height:20px; width:300px; text-align:center;" |This '''Feynman diagram''' shows the [[Weak Nuclear Interaction|weak interaction]] in which a [[neutron]] [[Radioactive Decay|decays]] into a [[proton]].
<math>n \rightarrow p + \beta^- + \bar\nu_e</math>
|[[File:FeynmanDiagramUpDecay.png|center|300px]]
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| style="height:20px; width:300px; text-align:center;" |This '''Feynman diagram''' shows the [[Weak Nuclear Interaction|weak interaction]] in which a [[proton]] [[Electron Capture|captures]] an [[electron]] to become a [[neutron]].
<math>p + \beta^- \rightarrow n + \nu_e</math>
| style="height:20px; width:300px; text-align:center;" |This '''Feynman diagram''' shows the [[Weak Nuclear Interaction|weak interaction]] in which an [[up-quark]] [[Radioactive Decay|decays]] into a [[down-quark]], which is observed as a [[proton]] [[Radioactive Decay|decaying]] into a [[neutron]] via [[Beta Particle|beta]] emission.
<math>u \rightarrow d + \beta^+ + \nu_e</math>
|}