Bound state formation in the DDK system

We study the $DDK$ system in a coupled channel approach, by including $D{D}_{s}\ensuremath{\eta}$ and $D{D}_{s}\ensuremath{\pi}$, and find that the dynamics involved in the system forms a bound state with isospin $1/2$ and mass 4140 MeV when one of the $DK$ pair is resonating in isospin 0, forming the ${D}_{s0}^{*}(2317)$. The state can be interpreted as a $D{D}_{s0}^{*}(2317)$ molecule like state with exotic quantum numbers: doubly charged, doubly charmed, and with single strangeness.