Zc(4200)⁺ Z c ( 4200 ) + decay width as a charmonium-like tetraquark state

To identify the nature of the newly observed charged resonance Zc(4200)⁺ , we study its hadronic decays Zc(4200)⁺→ J/ψ π ⁺, Zc(4200)⁺→ η cρ ⁺ and Zc(4200)⁺→ D⁺D̄*0 as a charmonium-like tetraquark state. In the framework of the QCD sum rules, we calculate the three-point functions and extract the coupling constants and decay widths for these interaction vertices. Including all these channels, the full decay width of the Zc(4200)⁺ state is consistent with the experimental value reported by the Belle Collaboration, supporting the tetraquark interpretation of this state.