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 $D_s(2700)$.

Comments: 12 pages, 3 figures, extended version