Recent progress in backreacted bottom-up holographic QCD

TL;DR

This paper reviews recent advances in bottom-up holographic QCD models, focusing on improved holographic QCD and V-QCD, which successfully replicate QCD phase diagrams and spectra by incorporating gluon and flavor dynamics.

Contribution

It introduces and discusses the development of backreacted bottom-up holographic models like improved holographic QCD and V-QCD, highlighting their agreement with QCD results.

Findings

V-QCD models match QCD phase diagrams

Spectra of V-QCD agree with other methods

Backreaction of flavor is successfully incorporated

Abstract

Recent progress in constructing holographic models for QCD is discussed, concentrating on the bottom-up models which implement holographically the renormalization group flow of QCD. The dynamics of gluons can be modeled by using a string-inspired model termed improved holographic QCD, and flavor can be added by introducing space filling branes in this model. The flavor fully backreacts to the glue in the Veneziano limit, giving rise to a class of models which are called V-QCD. The phase diagrams and spectra of V-QCD are in good agreement with results for QCD obtained by other methods.