The decay\(D^0 \to \bar K^0 \phi \)

The decay\(D^0 \to \bar K^0 \phi \) has been investigated using data accumulated by the ARGUS experiment, which operates at around 10 GeV centre-of-mass energies The decay\(D^0 \to \bar K^0 \phi \) is a signature for flavor annihilation byW-exchange in weak decays. It is shown that this decay occurs at (15.5±3.3)% of the rate for the well established decay\(D^0 \to \bar K^0 \phi \)π+π−. This translates into a branching ratio for\(D^0 \to \bar K^0 \phi \) of (1.18±0.25±0.17)%