Two-body strong decays of the pseudoscalar hidden-charm tetraquark states via the QCD sum rules

In this work, we study the properties of the pseudoscalar hidden-charm tetraquark states by analyzing their two-body strong decays via the QCD sum rules based on rigorous quark-hadron duality. We take into account the vacuum condensates up to dimension 5 on the QCD side, and obtain the hadronic coupling constants. At last, we obtain the total decay widths [Formula: see text] MeV and [Formula: see text] MeV, respectively, where the [Formula: see text]([Formula: see text]) and [Formula: see text]([Formula: see text]) denote the pseudoscalar hidden-charm tetraquarks with the diquark-antidiquark structures [Formula: see text] and [Formula: see text], respectively.