The dynamical holographic QCD method for hadron physics and QCD matter

TL;DR

This paper reviews the dynamical holographic QCD model, a 5D framework that captures gluodynamics and chiral dynamics, providing insights into hadron spectra, QCD phase transitions, and thermodynamics.

Contribution

It introduces a dynamical holographic QCD model that incorporates gluon and chiral condensates, connecting UV and IR physics through a 5D gravity framework.

Findings

Reproduces hadron and glueball spectra

Describes QCD phase transitions and thermodynamics

Models chiral symmetry breaking and confinement

Abstract

In this paper we present a short overview on the dynamical holographic QCD method for hadron physics and QCD matter. The 5-dimensional dynamical holographic QCD model is constructed in the graviton-dilaton-scalar framework with the dilaton background field $\Phi$ and the scalar field $X$ dual to the gluon condensate and the chiral condensate operator thus can represent the gluodynamics (linear confinement) and chiral dynamics (chiral symmetry breaking), respectively. The dilaton background field and the scalar field are a function of the 5th dimension, which plays the role of the energy scale, in this way, the DhQCD model can resemble the renormalization group from ultraviolet (UV) to infrared (IR). By solving the Einstein equation, the metric structure at IR is automatically deformed by the nonperturbative gluon condensation and chiral condensation in the vacuum. We review the results on the hadron spectra including the glueball spectra, the light/heavy meson spectra, as well as on QCD phase transitions, and thermodynamical as well as transport properties in the framework of the dynamical holographic QCD model.