Glueballs at finite temperature from AdS/QCD

TL;DR

This paper reviews the application of the AdS/QCD soft-wall model to study scalar glueball spectra at finite temperature, revealing how their masses and decay widths change in a quark-gluon plasma.

Contribution

It introduces a holographic approach to analyze scalar glueballs at finite temperature using the soft-wall AdS/QCD model, focusing on their spectral properties.

Findings

Masses of scalar glueballs decrease with temperature.

Decay widths of glueballs increase as temperature rises.

Spectral poles shift indicating modifications in glueball stability.

Abstract

Inspired in the AdS/CFT correspondence, a variety of holographic phenomenological models have been proposed in the last years to describe non-perturbative aspects of strong interactions. These models are denominated as AdS/QCD. In this work we review the use of the AdS/QCD soft-wall model to investigate the spectrum of scalar glueballs at finite temperature. The scalar glueball states are identified as the poles of the retarded correlation function of the glueball operator. In the gauge/gravity duality, these poles are determined by the quasinormal spectrum of a massless scalar field propagating in the bulk geometry that consists on an ${AdS}_{5}$ black hole with a background dilaton field. We discuss some results for masses and decay widths of scalar glueballs in the plasma phase and analyse how these quantities evolve with temperature and momentum.