Box Feynman diagram
= Box Feynman diagram
A one-loop <Feynman diagram> with four vertices joined into a box. Two <W bosons> and two internal <quarks> give a short-distance contribution to <neutral D-meson mixing>.
= Box Feynman diagram
A one-loop <Feynman diagram> with four vertices joined into a box. Two <W bosons> and two internal <quarks> give a short-distance contribution to <neutral D-meson mixing>.