\alpha'-Corrected Chiral Magnetic Effect

TL;DR

This paper investigates how alpha'-corrections in string theory influence the Chiral Magnetic Effect (CME) using holographic duality, revealing increased CME magnitude for massive solutions and new solutions with non-zero CME.

Contribution

It demonstrates the impact of alpha'-corrections on D7-brane embeddings and CME, including the emergence of non-zero CME solutions and removal of singularities.

Findings

CME magnitude increases for massive solutions with alpha'-correction

Some embeddings gain non-zero CME after correction

Alpha'-correction removes singularities in certain embeddings

Abstract

Using AdS/CFT correspondence, the effect of alpha'-correction on the value of Chiral Magnetic Effect(CME) is computed by adding a number of spinning probe D7-branes in the $\alpha'$-corrected background. We show that although for the massive solutions the magnitude of CME increases in the presence of alpha'-correction, it does not change for the massless solution. However some of the D7-brane embeddings have no CME, after applying alpha'-correction, they find a non-zero value for the CME. As a result the number of solutions with a non-zero CME increases. We also show that the effect of alpha'-correction removes the singularity from some of the D7-brane embeddings.