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Masses for the $(Q\bar{s})^{(*)}(\bar{Q}s)^{(*)}$ ($Q=c$ or $b$) molecularstates are systematically computed in the framework of QCD sum rules.Technically, contributions of the operators up to dimension six are included inoperator product expansion (OPE). The numerical result $4.13\pm0.10 {GeV}$ for$D_{s}^{*}\bar{D}_{s}^{*}$ agrees well with the mass $4143.0\pm2.9\pm1.2 {MeV}$for Y(4140), which supports the $D_{s}^{*}\bar{D}_{s}^{*}$ molecularconfiguration for Y(4140).

$(Q\bar{s})^{(*)}(\bar{Q}s)^{(*)}$ molecular states from QCD sum rules: a view on Y(4140)

$(Q\bar{s})^{()}(\bar{Q}s)^{()}$ molecular states from QCD sum rules: a view on Y(4140)