Dynamical holographic QCD with area-law confinement and linear Regge trajectories

TL;DR

This paper develops a dynamical holographic QCD model using a five-dimensional gravity setup that reproduces key features like linear confinement and meson spectra with linear Regge trajectories, aligning well with experimental observations.

Contribution

It introduces a new dynamical solution in holographic QCD that naturally incorporates area-law confinement and linear Regge trajectories for mesons.

Findings

Reproduces linear confinement via a deformed AdS metric.

Predicts meson masses on linear trajectories consistent with experiments.

Provides a dynamic holographic model matching key QCD features.

Abstract

We construct a new solution of five-dimensional gravity coupled to a dilaton which encodes essential features of holographic QCD backgrounds dynamically. In particular, it implements linear confinement, i.e. the area law behavior of the Wilson loop, by means of a dynamically deformed anti-de Sitter metric. The predicted square masses of the light-flavored natural-parity mesons and their excitations lie on linear trajectories of approximately universal slope with respect to both radial and spin quantum numbers and are in satisfactory agreement with experimental data.