Confined phases at finite density in the Hardwall model

TL;DR

This paper introduces new AdS/QCD backgrounds that model confined hadronic phases at finite baryon density, providing insights into QCD phase structure through holographic methods.

Contribution

It presents a class of backgrounds in the Hardwall model that successfully describe confined phases at finite density, filling a gap in holographic QCD models.

Findings

Phase diagrams align with PNJL model results

New backgrounds model confined phases at finite density

Applicable to geometries with dilaton fields

Abstract

AdS/QCD models are being extensively studied because they seem to offer an entirely tractable and radically different approach to the phases of QCD whose region of validity is precisely the region of strong interactions. In this context, a missing ingredient has been the absence of a bulk description dual to a confined hadronic phase at finite baryon density. In this work, we discuss a class of backgrounds that fill this lacuna. Applying physically motivated boundary conditions, we obtain phase diagrams which compare reasonably with approaches based on the PNJL model. We also show that such backgrounds can play a similar role in geometries with a dilaton field.