Quark Antiscreening at Strong Magnetic Field and Inverse Magnetic Catalysis

TL;DR

This paper explores how strong magnetic fields induce anisotropic effects in QCD, leading to antiscreening and inverse magnetic catalysis, which influence the critical temperature of the chiral phase transition.

Contribution

It demonstrates that a strong magnetic field causes anisotropic coupling and antiscreening effects in QCD, explaining inverse magnetic catalysis and the behavior of the critical temperature.

Findings

Coupling constant becomes anisotropic under strong magnetic fields.

Quarks in the lowest Landau level produce antiscreening effects.

Inverse magnetic catalysis explains the critical temperature behavior.

Abstract

The dependence of the QCD coupling constant with a strong magnetic field and the implications for the critical temperature of the chiral phase transition are investigated. It is found that the coupling constant becomes anisotropic in a strong magnetic field and that the quarks, confined by the field to the lowest Landau level where they pair with antiquarks, produce an antiscreening effect. These results lead to inverse magnetic catalysis, providing a natural explanation for the behavior of the critical temperature in the strong-field region.