This Feynman diagram shows the neutral kaon turning into by means of the exchange of a pair of W bosons. This diagram, together with the rotated diagram (shown below), give the leading terms to CP violation.
The image below shows the same diagram, emphasizing the structure of the Kaons.
(<span class="autocomment"><a href="/wiki/Image:Kaon-box-diagram-alt.svg#Kaon_box_diagram" title="Image:Kaon-box-diagram-alt.svg">→</a>Kaon box diagram -</span> a related image)
La bildo estas kopiita de wikipedia:en. La originala priskribo estas: == Kaon box diagram == This Feynman diagram shows the neutral kaon <math>K^0</math> turning into <math>\overline{K}^0</math> by means of the exchange of a pair of W bosons