Chiral Magnetic Effect in the Anisotropic Quark-Gluon Plasma

TL;DR

This paper models an anisotropic quark-gluon plasma holographically and investigates how anisotropy affects the chiral magnetic effect, revealing increased CME for massive quarks with higher anisotropy.

Contribution

It introduces a novel holographic model with two functions for horizon and Dilaton field values, and analyzes the impact of anisotropy on the chiral magnetic effect.

Findings

CME is equal for massless quarks in isotropic and anisotropic plasmas.

Increasing anisotropy raises CME for massive quarks at fixed temperature.

First-time derivation of horizon and Dilaton field functions in terms of temperature and anisotropy.

Abstract

An anisotropic thermal plasma phase of a strongly coupled gauge theory can be holographically modelled by an anisotropic AdS black hole. The temperature and anisotropy parameter of the AdS black hole background of interest [1] is specified by the location of the horizon and the value of the Dilaton field at the horizon. Interestingly, for the first time, we obtain two functions for the values of the horizon and Dilaton field in terms of the temperature and anisotropy parameter. Then by introducing a number of spinning probe D7-branes in the anisotropic background, we compute the value of the chiral magnetic effect (CME). We observe that in the isotropic and anisotropic plasma the value of the CME is equal for the massless quarks. However, at fixed temperature, raising the anisotropy in the system will increase the value of the CME for the massive quarks.