http://www.ck12.org Chapter 26. Feynman’s Diagrams Version 2
26.3 Example
TABLE26.1:
Question: For the following Feynman diagrams, describe in words the process that is occurring. For instance: (a)
what type of interaction: annihilation or scattering (b) what are the incoming articles? (c) which kind of boson
mediates the interaction? (d) which fundamental force is involved in the interaction? (e) what are the outgoing
particles? Also, is the interaction "allowed"?
Answer: In this Feynman diagram, one of the down quark from a neutron splits into a upward quark, an electron,
and a electron neutrino via aW−particle. Because this does not break any laws, this interaction is allowed. Infact,
this is a interaction that we already know. This isβdecay.