Mesonic Spectrum from a Dynamical Gravity/Gauge model

TL;DR

This paper develops a dynamical gravity/gauge model within the AdS/QCD framework to compute the light meson spectrum, including decay widths, demonstrating confinement through dilaton-gravity interactions.

Contribution

It introduces a dynamical IR-deformed AdS background with a dilaton field to calculate meson spectra and decay widths, advancing the modeling of confinement and meson properties.

Findings

Regge-like spectrum for light mesons obtained

Decay width of scalar mesons into two pions calculated

Confinement achieved via dilaton-gravity coupling

Abstract

Within a formulation of a Dynamical AdS/QCD model we calculate the spectrum of light flavored mesons. The background fields of the model correspond to an IR deformed Anti de Sitter metric coupled to a dilaton field. Confinement comes as a consequence of the dilaton dynamics coupled to gravity. Additionally to the Regge-like spectrum of light- scalar, vector and higher spin mesons, we obtain the decay width of scalar mesons into two pions.