$\{Q\bar{s}\}\{\bar{Q}^{(')}s\}$ molecular states in QCD sum rules

Details $\{Q\bar{s}\}\{\bar{Q}^{(')}s\}$ molecular states in QCD sum rules $\{Q\bar{s}\}\{\bar{Q}^{(')}s\}$ molecular states in QCD sum rules

2009-05-28

arxiv.org/abs/0905.4672v3

Commun.Theor.Phys.54:1075-1090,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 30 eps figures

Scientific paper

10.1088/0253-6102/54/6/22

We systematically investigate the mass spectra of $\{Q\bar{s}\}\{\bar{Q}^{(')}s\}$ molecular states in the framework 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 for molecular states with various $\{Q\bar{s}\}\{\bar{Q}^{(')}s\}$ configurations are presented. The result $4.36\pm0.08 GeV$ for the $D_{s}^{*}\bar{D}_{s0}^{*}$ molecular state is consistent with the mass $4350^{+4.6}_{-5.1}\pm0.7 MeV$ of the newly observed $X(4350)$, which could support $X(4350)$ interpreted as a $D_{s}^{*}\bar{D}_{s0}^{*}$ molecular state.

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