Analysis of the $X_0(2900)$ as the scalar tetraquark state via the QCD sum rules

TL;DR

This paper investigates the nature of the $X_0(2900)$ particle, proposing it as a scalar tetraquark state using QCD sum rules, and predicts its mass to support this interpretation.

Contribution

It is the first to apply QCD sum rules to analyze the $X_0(2900)$ as a scalar tetraquark with specific diquark configurations.

Findings

Predicted mass of $AA$-type tetraquark: 2.91 GeV

Predicted mass of $SS$-type tetraquark: 3.05 GeV

Supports $X_0(2900)$ as $AA$-type scalar tetraquark

Abstract

In this article, we study the axialvector-diquark-axialvector-antidiquark ($AA$) type and scalar-diquark-scalar-antidiquark ($SS$) type fully open flavor $cs\bar{u}\bar{d}$ tetraquark states with the spin-parity $J^P={0}^+$ via the QCD sum rules. The predicted masses $M_{AA}=2.91\pm0.12\,\rm{GeV}$ and $M_{SS}=3.05\pm0.10\,\rm{GeV}$ support assigning the $X_0(2900)$ to be the $AA$-type scalar $cs\bar{u}\bar{d}$ tetraquark state.