a privileged case to test the nature of these resonances. Indeed, as we shall see, the three processes are Cabibbo allowed and the rates of production are big compared to those of the $\bar{B}^0$ decays into $J/\psi$ and one of these resonances, where necessarily one of the vertices, the $V_{cb}$, is Cabibbo suppressed [@Aaij:2011fx; @Aaij:2013zpt; @Stone:2013eaa]. On the other hand, the $a_0(980)$ has not been reported in $\bar{B}^0$, $\bar{B}^0_s$ decays. As one can see in Ref. [@Stone:2013eaa; @weihong], in the decay of $\bar{B}^0_s$ into $J/\psi$ one gets an extra $s \bar s$ pair that has $I=0$ and does not allow the $a_0(980)$ production upon hadronization. On the other hand in the $B^0$ decay into $J/\psi$ one gets an extra $d
\bar d$ pair that could lead to the $a_0(980)$ upon hadronization, but the process is doubly Cabibbo suppressed. It is found there that a signal is seen for the $f_0(500)$ production and only a small fraction is reported for $f_0(980)$ production [@Aaij:2013zpt]. One should expect also a minor rate for $a_0(980)$ production in this case and, in fact, this mode of decay is not reported. In the present case the $a_0(980)$ production is allowed and the rates are large [@Rubin:2004cq]. 