Analysis of the nonet scalar mesons as tetraquark states with new QCD sum rules

TL;DR

This paper investigates nonet scalar mesons as tetraquark states using novel QCD sum rules, modeling scalar diquarks as fundamental fields and incorporating new vacuum condensates for improved analysis.

Contribution

It introduces a new approach to study scalar mesons as tetraquarks by treating diquarks as basic fields and applying updated QCD sum rules with novel vacuum condensates.

Findings

Diquark currents better satisfy QCD sum rule criteria than conventional quark currents.

The approach provides new insights into the structure of scalar mesons as tetraquark states.

Enhanced understanding of nonet scalar mesons within the tetraquark framework.

Abstract

In this article, we take the scalar diquarks as point particles and describe them as basic quantum fields, then introduce the SU(3) color gauge interaction and new vacuum condensates to study the nonet scalar mesons as tetraquark states with the QCD sum rules. Comparing with the conventional quark currents, the diquark currents have the outstanding advantage to satisfy the two criteria of the QCD sum rules more easily.