Analysis of the scalar and axial-vector heavy diquark states with QCD sum rules

Abstract

In this article, we study the mass spectrum of the scalar and axial-vector heavy diquark states with the QCD sum rules in a systematic way. Once the reasonable values are obtained, we can take them as basic parameters and study the new charmonium-like states as the tetraquark states.Comment: 16 pages, 24 figures, slight revisio