{Q(s)over-bar}{(Q)over-bar(('))s} Molecular States in QCD Sum Rules

We systematically investigate the mass spectra of {Q (s) over bar}{(Q) over bar (('))s} molecular states in the frame work of QCD sum rules. The interpolating currents representing the molecular states are proposed. Technically, contributions of the operators up to dimension six are included in operator product expansion (OPE). The masses formolecular states with various {Q (s) over bar}{(Q) over bar (('))s}configurations a represented. The result 4.36 +/- 0.08 GeV for the D-s*(D) over bar (s0)* molecular state is consistent with the mass 4350(-5.1)(+4.6)+/- 0.7 MeV of the newly observed X(4350), which could support X (4350) interpreted as a D-s*(D) over bar (s0)* molecular state.