Scalar or Vector Tetraquark State Candidate: Zc(4100)

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2019,（11）
• 页码范围: 1319-1327
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/0253-6102/71/11/1319

摘要

In this article,we separate the vector and axialvector components of the tensor diquark operators explicitly,construct the axialvector-axialvector type and vector-vector type scalar tetraquark currents and scalar-tensor type tensor tetraquark current to study the scalar,vector and axialvector tetraquark states with the QCD sum rules in a consistent way.The present calculations do not favor assigning the Zc(4100) to be a scalar or vector tetraquark state.If the Zc(4100) is a scalar tetraquark state without mixing effects,it should have a mass about 3.9 GeV or 4.0 GeV rather than 4.1 GeV;on the other hand,if the Zc(4100) is a vector tetraquark state,it should have a mass about 4.2 GeV rather than 4.1 GeV.However,if we introduce mixing,a mixing scalar tetraquark state can have a mass about 4.1 GeV.As a byproduct,we obtain an axialvector tetraquark candidate for the Zc(4020).