Is Ds(2700) a charmed tetraquark state ?
Abstract
In this article, we take the point of view that the Ds(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 MV=(3.750.18)GeV or MV=(3.710.15)GeV from different sum rules, which is about 1GeV larger than the experimental data. Such tetraquark component should be very small in the Ds(2700).
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