Understanding the nature of $D_s(2317)$ and $D_s(2460)$ through nonleptonic B Decays

Abstract

We consider the nonleptonic B decays $B\to D^{(\ast )}{D}_s(2317)$ and $B\to D^{(\ast )}{D}_s(2460)$, involving the newly discovered $D_s(2317)$ and the $D_s(2460)$ states. We find that experiments indicate disagreement with model calculations of their properties and/or breakdown of the factorization assumption for these decays . We point out that decays involving $B_s$ mesons where the $D_s$ resonances can be produced via the weak decay of the $b$ quark can provide further information about the nature of these newly discovered states. We also propose a model to calculate the two body nonleptonic decays $B\to D^{(\ast )}{D}_s(2317)(D_s(2460))$, if the $D_s(2317)$ and $D_s(2460)$ are interpreted as $DK$ and $D^{\ast }K$ molecules.

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