Cabibbo-angle-favoredD→PPandD→VPdecays: A dispersion approach

We have studied D→PP and D→VP decays in a dispersion approach. We have explicitly included the flavor-annihilation process and investigated the circumstances where its contribution could become large. Data point to a substantial flavor-annihilation term in all these decays. We also estimate the branching ratios for $D^0$→K¯ ${}_{}{}^0{}_{}{}^{}\eta$, $D^0$→K¯ ${}_{}{}^0{}_{}{}^{}\mathcal{’}$, $D^0$→K¯ ${}_{}{}^0{}_{}{}^{}\phi$, and $D^0$→K¯ ${}_{}{}^0{}_{}{}^{}\omega$.