Cabibbo-angle-favored<i>D→PP</i>and<i>D→VP</i>decays: A dispersion approach

Abstract

We have studied D\ensuremath{\rightarrow}PP and D\ensuremath{\rightarrow}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 ${D}^{0}$\ensuremath{\rightarrow}K\ifmmode\bar\else\textasciimacron\fi{} $^{0}\ensuremath{\eta}$, ${D}^{0}$\ensuremath{\rightarrow}K\ifmmode\bar\else\textasciimacron\fi{} $^{0}\mathcal{'}$, ${D}^{0}$\ensuremath{\rightarrow}K\ifmmode\bar\else\textasciimacron\fi{} $^{0}\ensuremath{\varphi}$, and ${D}^{0}$\ensuremath{\rightarrow}K\ifmmode\bar\else\textasciimacron\fi{} $^{0}\ensuremath{\omega}$.