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

TL;DR

This paper systematically studies the mass spectrum of scalar and axial-vector heavy diquark states using QCD sum rules, providing parameters for analyzing new charmonium-like tetraquark states.

Contribution

It introduces a systematic QCD sum rule approach to determine heavy diquark masses, aiding the understanding of exotic tetraquark states.

Findings

Mass spectra of scalar and axial-vector heavy diquarks determined.

Parameters established for analyzing charmonium-like tetraquark states.

Provides a foundation for future exotic hadron research.

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.