Mass spectrum and strong decays of tetraquark $${\bar{c}}{\bar{s}} qq$$ states

Abstract We systematically study the mass spectrum and strong decays of S-wave $${\bar{c}}{\bar{s}} q q$$ c ¯ s q states in compact tetraquark scenario with quark model. The key ingredients model are Coulomb, linear confinement, hyperfine interactions. potential leads to mixing between different color configurations, large splitting two ground $$I(J^P)=0(0^+)$$ I ( J P ) = 0 + $$I(J^P)=1(0^+)$$ 1 . calculate their decay amplitudes into $${\bar{D}}^{(*)}K^{(*)}$$ D ? K channels wave functions from calculation quark-interchange method. examine interpretation recently observed $$X_0(2900)$$ X 2900 as a state. width state $$M=2941$$ M 2941 MeV $$\Gamma _X=26.6$$ ? 26.6 MeV, respectively, which indicates that it might be good candidate for Meanwhile, we also obtain an isospin partner $$M=2649$$ 2649 _{X\rightarrow {\bar{D}} K}=48.1$$ ? 48.1 respectively. Future experimental search X (2649) will very helpful.