Forbidden coupling and inhibited decay: A study of disconnected quark diagrams

An attempt is made to correlate deviation from ideal-mixing mass formula, high-energy scattering behavior, and violation of the Okubo-Zweig-Iizuka rule. Pole or cut nature of the intermediary is discussed. Timelike and spacelike forbidden communications are compared. Off-shell effects are examined. Some problems for phenomenology are revealed.