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We investigate the $D^*K^*$ and $D^*_s\rho$ interaction in coupled channelswithin the hidden gauge formalism. A structure is developed around theirthresholds, short of producing a bound state, which leads to a peak in the$D_s^+ \pi^-$ mass distribution in the $B^0 \to \bar{D}^0 D_s^+ \pi^-$ decaycompatible with the experimental data. We conclude that the interaction betweenthe $D^*K^*$ and $D^*_s\rho$ is essential to produce the cusp structure that weassociate to the recently seen $T_{c\bar{s}}(2900)$, and that its experimentalwidth is mainly due to the decay width of the $\rho$ meson. The peak obtainedtogether with a smooth background reproduces fairly well the experimental massdistribution observed in the $B_0 \to \bar{D}^0 D_s^+ \pi^-$ decay.

The $T_{c\bar{s}}(2900)$ as a threshold effect from the interaction of the $D^*K^*$, $D^*_s\rho$ channels

The $T_{c\bar{s}}(2900)$ as a threshold effect from the interaction of the $D^K^$, $D^*_s\rho$ channels