On the YM and QCD spectra from five dimensional strings

TL;DR

This paper explores a five-dimensional string model that aims to describe QCD spectra, including glueballs and mesons, by matching string modes with field theory predictions in a large N_c and N_f limit.

Contribution

It introduces a non-critical five-dimensional string setup with D-branes to model QCD spectra and discusses the correspondence between string modes and QCD states.

Findings

Potential matching of gravity modes with light glueballs

Interpretation of brane spectrum in Yang-Mills and QCD contexts

Insights into the dual description of QCD spectra from string theory

Abstract

We consider a non-critical five dimensional string setup which could provide a dual description of QCD in the limit of large number of colors and flavors. The model corresponds to N_c color D3-branes and N_f D4/anti D4-brane pairs supporting flavor degrees of freedom. The matching of the string model spectrum with the dual field theory one is considered. We discuss the consequences of the possible matching of the gravity modes with the light glueballs and the interpretation of the brane spectrum in Yang-Mills and QCD.