Is D_s(2700) a charmed tetraquark state ?

Abstract

In this article, we take the point of view that the $D_s(2700)$ be a tetraquark state, which consists of a scalar diquark and a vector antidiquark, and calculate its mass with the QCD sum rules. The numerical result indicates that the mass of the vector charmed tetraquark state is about $M_V=(3.75\pm 0.18)\mathrm{GeV}$ or $M_V=(3.71\pm 0.15)\mathrm{GeV}$ from different sum rules, which is about $1\mathrm{GeV}$ larger than the experimental data. Such tetraquark component should be very small in the $D_s(2700)$.

12 pages, 3 figures, extended version

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• Analysis of Y(4660) and related bound states with QCD sum rules
• Mass spectra and decay properties of $D$ Meson in a relativistic Dirac formalism
• Another tetraquark structure in the ${\pi }^{+}{\chi }_{c1}$ invariant mass distribution
• Mass spectrum of the scalar hidden charm and bottom tetraquark states
• Mass spectrum of the axial-vector hidden charmed and hidden bottom tetraquark states
• Mass spectrum of the vector hidden charm and bottom tetraquark states
• Reanalysis of the mass spectrum of the scalar hidden charm and hidden bottom tetraquark states
• Possible tetraquark states in the ${\pi }^{+}{\chi }_{c1}$ invariant mass distribution