Doubly charmed strange tetraquark

The LHCb experiment at CERN has discovered a doubly charmed isoscalar tetraquark ${T}_{cc}$ with the quantum numbers of $cc\overline{u}\overline{d}$ and mass about $3875\text{ }\text{ }\mathrm{MeV}/{c}^{2}$, decaying to ${D}^{0}{D}^{0}{\ensuremath{\pi}}^{+}$ through intermediate channel ${D}^{*+}{D}^{0}$. We present study its strange companions $cc\overline{q}\overline{s}$, where $q=u$, $d$ isospin violation is neglected.