$D_s$ decays to $\hat{I}\cdot$ and $\hat{I}{\cdot }^{\prime }$ final states: a phenomenological analysis

Abstract

We consider the semileptonic and nonleptonic $D_s$ decay modes to final states with $\hat{I}\cdot$ and $\hat{I}{\cdot }^{\prime }$. We use QCD sum rules to determine the $D_s\to \hat{I}\cdot$ form factor $f_{+}^{\hat{I}}\cdot$, and a generalized factorization ansatz to compute nonleptonic decays. We propose a parameterization of possible OZI suppressed contributions producing the $\hat{I}{\cdot }^{\prime }$ in the final state, compatible with current data; such a scheme can be further constrained improving the precision of the measurement of the $D_s$ decay rates, as expected by the ongoing experiments.

LaTex, 15 pages, 3 eps figures. Some references added