Pure glueball states in a Light-Front holographic approach

TL;DR

This paper uses Light-Front holography within the AdS/QCD framework to analyze scalar glueball and meson spectra, finding good agreement with lattice QCD and experimental data, and exploring glueball-meson mixing phenomena.

Contribution

It introduces a Light-Front holographic approach to study scalar glueball and meson spectra, providing insights into their mixing and degeneracy at energies above 2 GeV.

Findings

Spectra agree with lattice QCD and PDG data.

Degenerate pairs of glueball and meson states above 2 GeV.

Glueball-meson mixing influences scalar particle phenomenology.

Abstract

A phenomenological analysis of the scalar glueball and scalar meson spectra is carried out by using the AdS/QCD framework in the bottom-up approach. The resulting spectra are in good agreement for glueballs with lattice QCD results and for mesons with PDG data. We make use of the relation between the mode functions in AdS/QCD and the wave functions in Light-Front $QCD$ to discuss the mixing of glueballs and mesons. The results of our investigation point out that above 2 GeV scalar particles will appear in almost degenerate pairs of unmixed glueball and mesons states leading to an interesting phenomenology whereby gluon dynamics could be well investigated.