Chiral transition in the probe approximation from an Einstein-Maxwell-dilaton gravity model

TL;DR

This paper refines a 5D holographic QCD model to better capture magnetic effects on chiral and deconfinement transitions, improving predictions of QCD behavior under strong magnetic fields.

Contribution

It introduces modifications to an Einstein-Maxwell-dilaton model to accurately describe inverse catalysis and quark-antiquark potential at large distances.

Findings

Successful removal of unphysical flattening in the quark-antiquark potential

Inclusion of inverse catalysis for the chiral transition

Enhanced model accuracy for magnetic QCD phenomena

Abstract

We refine an earlier introduced 5-dimensional gravity solution capable of holographically capturing several qualitative aspects of (lattice) QCD in a strong magnetic background such as the anisotropic behaviour of the string tension, inverse catalysis at the level of the deconfinement transition or sensitivity of the entanglement entropy to the latter. Here, we consistently modify our solution of the considered Einstein-Maxwell-dilaton system to not only overcome an unphysical flattening at large distances in the quark-antiquark potential plaguing earlier work, but also to encapsulate inverse catalysis for the chiral transition in the probe approximation. This brings our dynamical holographic QCD model yet again closer to a stage at which it can be used to predict magnetic QCD quantities not directly computable via lattice techniques.