Exotic ■s((*))D((*)) molecular states and sc■ tetraquark states with JP=0+,1+,2+

作者：王齐男; 陈伟^*; 陈华星

来源：Chinese Physics C, 2021, 45(09): 32-47.

• molecular state
• exotic state
• QCD sum rules

We have calculated the mass spectra for the ■s((*))D((*)) molecular states and sc■ tetraquark states with JP=0+,1+,2+.The masses of the axial-vector ■sD*,■s*D molecular states and ■ tetraquark states are predicted to be approximately 3.98 GeV,in good agreement with the mass of Zcs(3985)- from BESⅢ.In both the molecular and diquark-antidiquark scenarios,our results suggest that there may exist two almost degenerate states,as the strange partners of X(3872) and Zc(3900).We propose to carefully examine Zcs(3985) in future experiments to verify this.One may also search for more hidden-charm four-quark states with strangeness in not only the open-charm ■s((*))D((*)) channels but also the hidden-charm channels ηcK/K*,J/ψK/K*.

• 单位
  中山大学; 东南大学