Recent content by milch

Aaah, somehow I thought the Cabibbo suppression just applies in case of a quark-quark decay. But it holds whenever any kind of quark coupling is involved (independent of the "direction" I go in the diagram), right? (Sorry in advance for these basic questions..)

Hey community! Since a couple of hours I've been dealing with the question why the decay $$D^0 \rightarrow K^+ K^-$$ is suppressed. If I draw the Feynman diagram for the first order decay, everything seems pretty alright as the charm quark can couple with a strange quark. The resulting W+ can...