Exotic double-charm molecular states with hidden or open strangeness and around 4.5 ∼ 4.7 GeV

In this work, we investigate the interactions between the charmed-strange meson (D-s, D-s*) in H-doublet and the (anti-)charmed-strange meson (D-s1, D-s2*) in T-doublet, where the one boson exchange model is adopted by considering the S-D wave mixing and the coupled-channel effects. By extracting the effective potentials for the discussed H-s(T) over bar (s) and H-s(T) over bar (s) systems, we try to find the bound state solutions for the corresponding systems. We predict the possible hidden-charm hadronic molecular states with hidden strangeness, i.e., the D-s*(D) over bar (s1) + c.c. states with J(PC) = 0(--),0(-+) and the D-s* (D) over bar (s2)* + c.c. states with JPC = 1(--),1(-+). Applying the same theoretical framework, we also discuss the HsTs systems. Unfortunately, the existence of the open-charm and open-strange molecular states corresponding to the HsTs systems can be excluded.