Scalar Glueball in a Top-Down Holographic Approach to QCD

TL;DR

This paper uses a top-down holographic QCD model to study the properties of the scalar glueball, addressing its mass, decay, and mixing challenges in understanding strong interaction dynamics.

Contribution

It introduces a holographic approach to analyze the scalar glueball, providing insights into its mass and decay properties within a QCD framework.

Findings

Predicted the scalar glueball mass within the holographic model.

Analyzed the two-pion decay channel of the scalar glueball.

Discussed mixing effects with quark-based states.

Abstract

Identification of glueballs -- bound states of gauge bosons in Quantum Chromodynamics (QCD) -- is a very important open question in dynamics of the strong interaction. The search for the glueball ground state, carrying scalar quantum numbers, poses a particular challenge due to the existence of (i) several candidates for its realisation in the physical spectrum and (ii) inevitable mixing of the pure glueball state with those comprised of quarks. In this article, I discuss implications of an approach in holographic QCD where, among others, the mass and the two-pion decay of the pure scalar glueball can be studied.