chemically bond. delta. Ichemically bond = (1/2 rule and consequences for D and B decays and epsilon'/epsilon

It is argued that chemically bond..delta..Ichemically bond = (1/2 K decays are dominated by transitions to virtual diquark-antidiquark states which then evolve into mesons. Virtual diquark formation also contributes significantly to the relatively short lifetime of the D/sup 0/ meson. It gives rise to a modified picture of the D/sup +/ width and of some baryon-antibaryon decays of B mesons. The CP-violating parameter epsilon' of the K system remains small and unaffected even though the corresponding operator transforms as an isospin doublet.