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We make predictions for ratios of branching fractions of $\bar B^0$ decaysinto $D^0$ and the scalar mesons $f_0(500)$, $f_0(980)$, $a_0(980)$, plus $\barB^0_s$ decay into $D^0$ and $\kappa(800)$. We also compare the $\pi^+ \pi^-$production in the scalar channel with that observed in the $\rho$ channel andmake predictions for the $\bar B^0_s$ decay into $D^0$ and $K^*(892)$,comparing the strength of this channel with that of $\kappa(800)$ production.The work is based on results of the chiral unitary approach where the scalarresonances are generated from the pseudoscalar-pseudoscalar interaction. Up toan arbitrary normalization, the mass distributions and rates for decays intothe scalar resonances are predicted with no free parameters. Comparison withexperimental data is done when available.

$\bar B^0$ decay into $D^0$ and $f_0(500)$, $f_0(980)$, $a_0(980)$, $\rho$ and $\bar B^0_s$ decay into $D^0$ and $\kappa(800)$, $K^{*0}$