Strange hidden-charm tetraquarks in constituent quark model

In the framework of the chiral quark model (ChQM), we systematically investigate the strange hidden-charm tetraquark systems cs (c) over bar(u) over bar with two structures: q (q) over bar - q (q) over bar and qq - (q) over bar(q) over bar. The bound-state calculation shows that there is no any bound state in present work, which excludes the molecular state explanation (D-0 D-s*(-)/D*D-0(s)-/D*D-0(s)*(-)) of the reported Z(cs) (3985)(-) or Z(cs) (4000)(+). However, the effective potentials for the cs - (c) over bar(u) over bar systems show the possibility of some resonance states. By applying a stabilization calculation and coupling all channels of both two structures, two new resonance states are obtained, which are the I J(P) = 1/20+ 1/21(+ )state with the energy around 4111-4116 MeV and the I J = 41+ state with energy around 4113-4119 MeV, respectively. Both of them are worthy of search in future experiments. Our results show that the coupling calculation between the bound channels and open channels is indispensable to provide the necessary information for experiments to search for exotic hadron states.