Effect of anomalous magnetic moment on the chiral transition at zero temperature in a strong magnetic field

TL;DR

This study examines how the anomalous magnetic moment influences the chiral transition at zero temperature under strong magnetic fields, revealing its significant impact on the critical chemical potential and magnetic catalysis effects.

Contribution

It introduces a parameterization of the anomalous magnetic moment proportional to the square of the chiral condensate and analyzes its effects on the chiral transition in ultrastrong magnetic fields.

Findings

Critical chemical potential decreases linearly with AMM coefficient.

At small AMM scale, magnetic field initially lowers then raises the critical chemical potential.

Large AMM scale suppresses magnetic catalysis on the critical chemical potential.

Abstract

The effect of the anomalous magnetic moment (AMM) on the chiral restoration is investigated at zero temperature in the strong magnetic fields with the vacuum magnetic regularization scheme. It is shown that the chiral restoration diagram sensitively depends on the AMM in the ultrastrong magnetic fields. In our work, the parameterization of AMM is employed as proportional to the square of the chiral condensate. The critical chemical potential is found to decrease linearly by the increasing coefficient in the AMM scale. At a smaller scale of the AMM, the critical chemical potential could go down and then grow up as the magnetic field increases. But at a larger scale, the magnetic catalysis on the critical chemical potential would not happen anymore.