D-wave excited ■ tetraquark states with JPC=1++ and 1+-

作者：杨梓衍; 陈伟

来源：Chinese Physics C, 2023, 47(05): 88-117.

• tetraquark states
• exotic states
• QCD sum rules

We study the mass spectra of D-wave excited cscs tetraquark states with JPC=1++ and 1+- in both symmetric ■ and antisymmetric ■ color configurations using the QCD sum rule method.We construct the D-wave diquark-antidiquark type of cscs tetraquark interpolating currents in various excitation structures with(Lλ,Lρ(lp1,lρ2))=(2,0{0,0)),(1,1{1,0)),(1,1{0,1)),(0,2{1,1)),(0,2{2,0}),(0,2{0,2}).Our results support the interpretation of the recently observed X(4685) resonance as a D-wave cscs tetraquark state with JPC=1++ in the(2,0{0,0)) or(0,2{2,0j) excitation mode,although some other possible excitation structures cannot be excluded exhaustively within theoretical errors.Moreover,our results provide the mass relations 6ρρ <3λλ <3λρ<3ρρ and6ρρ <3λλ <6λλ <3ρρ for the positive and negative C-parity D-wave ■ tetraquarks,respectively.We suggest searching for these possible D-wave ■ tetraquarks in both the hidden-charm channels J/Ψφ and ηcφ,as well as open-charm channels such as ■ and ■.

• 单位
  中山大学