The molecular systems composed of the charmed mesons in the $H\bar{S}+h\mathrm{.}c\mathrm{.}$ doublet

We study the possible heavy molecular states composed of a pair of charm mesons in the H and S doublets. Since the P-wave charm-strange mesons $D_{s0}(2317)$ and $D_{s1}(2460)$ are extremely narrow, the future experimental observation of the possible heavy molecular states composed of $D_s\mathrm{/}{D}_s^{\ast }$ and $D_{s0}(2317)\mathrm{/}{D}_{s1}(2460)$ may be feasible if they really exist. Especially the possible $J^{PC}=1^{--}$ states may be searched for via the initial state radiation technique.