Analysis of the X(3872), Zc(3900) and Zc(3885) as axial-vector tetraquark states with QCD sum rules

الأصل · EN

In this article, we distinguish the charge conjunctions of the interpolating currents, calculate the contributions of the vacuum condensates up to dimension-10 in a consistent way in the operator product expansion, study the masses and pole residues of the JPC=1⁺± hidden charmed tetraquark states with the QCD sum rules, and explore the energy scale dependence in details for the first time. The predictions Mₓ=3.87⁺⁰.⁰⁹₋₀.₀₉GeV and MZ=3.91⁺⁰.¹¹₋₀.₀₉GeV support assigning the X(3872) and Zc(3900) (or Zc(3885)) as the 1⁺⁺ and 1⁺⁻ diquark-antidiquark type tetraquark states, respectively.