Tetraquark candidates in LHCb's di-J/ψ mass spectrum

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2020,（11）
• 所属期刊栏目: PARTICLES AND FIELDS
• 页码范围: 79-85
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1137/abb080

摘要

In this article,we study the first radial excited states of the scalar,axialvector,vector,and tensor diquark-antidiquark-type cc(c)(c)tetraquark states with the QCD sum rules and obtain the masses and pole residues;then,we use the Regge trajectories to obtain the masses of the second radial excited states.The predicted masses support assign-ing the broad structure from 6.2 to 6.8 GeV in the di-J/ψ mass spectrum to be the first radial excited state of the scalar,axialvector,vector,or tensor cc(c)(c)tetraquark state,as well as assigning the narrow structure at about 6.9 GeV in the di-J/ψ mass spectrum to be the second radial excited state of the scalar or axialvector cc(c)(c)tetraquark state.