Molecular states with hidden charm and strange in QCD Sum Rules

Abstract

This work uses the QCD Sum Rules to study the masses of the $D_s \\bar{D}_s^*$\nand $D_s^* \\bar{D}_s^*$ molecular states with quantum numbers $J^{PC} =\n1^{+-}$. Interpolating currents with definite C-parity are employed, and the\ncontributions up to dimension eight in the Operator Product Expansion (OPE) are\ntaken into account. The results indicate that two hidden strange\ncharmonium-like states may exist in the energy ranges of $3.83 \\sim 4.13 $ GeV\nand $4.22 \\sim 4.54 $ GeV, respectively. The hidden strange charmonium-like\nstates predicted in this work may be accessible in future experiments, e.g.\nBESIII, BelleII and SuperB. Possible decay modes, which may be useful in\nfurther research, are predicted.\n