Chiral-Symmetry-Violating Effects and Near-Maximal Mixing of Scalar Gluonium and Quark Mesons

TL;DR

This paper uses Gaussian QCD sum-rules to analyze scalar mesons, revealing two states with near-maximal mixing of quark and gluonic components, consistent across multiple correlators.

Contribution

It provides the first comprehensive analysis showing consistent predictions of scalar meson masses and mixing from various correlation functions.

Findings

Identification of two scalar states with near-maximal quark-gluon mixing

Consistent mass predictions across different correlators

Evidence supporting mixed quark-gluonic nature of scalar mesons

Abstract

Gaussian QCD sum-rules are used to analyze all possible two-point correlation functions of scalar gluonic and quark currents. The independent predictions of the masses and relative coupling strengths from the different correlators are remarkably consistent with a scenario of two scalar states that couple to nearly-maximal mixtures of quark and gluonic currents.