Analysis of the X(5568) as scalar tetraquark state in the diquark-antidiquark model with QCD sum rules
Abstract
In this article, we take the X(5568) as the diquark-antidiquark type tetraquark state with the spin-parity JP=0+, construct the scalar-diquark-scalar-antidiquark type current, carry out the operator product expansion up to the vacuum condensates of dimension-10, and study the mass and pole residue in details with the QCD sum rules. We obtain the value MX=(5.570.12 ) \,GeV, which is consistent with the experimental data. The present prediction favors assigning the X(5568) to be the scalar tetraquark state.
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