Deconfinement and chiral transition in AdS/QCD wall models supplemented with a magnetic field

TL;DR

This paper investigates how magnetic fields influence deconfinement and chiral transitions in holographic QCD models, revealing contrasting behaviors that challenge current lattice data and highlight the need for improved models.

Contribution

It introduces generalized hard and soft wall AdS/QCD models with magnetic fields to study inverse magnetic catalysis effects on phase transitions.

Findings

Deconfinement temperature decreases with magnetic field.

Chiral restoration temperature increases with magnetic field.

Current models do not fully capture inverse magnetic catalysis.

Abstract

We discuss the phenomenon of (inverse) magnetic catalysis for both the deconfinement and chiral transition. We discriminate between the hard and soft wall model, which we suitably generalize to include a magnetic field. Our findings show a critical deconfinement temperature going down, in contrast with the chiral restoration temperature growing with increasing magnetic field. This is at odds with contemporary lattice data, so the quest for a holographic QCD model capable of capturing inverse magnetic catalysis in the chiral sector remains open.