Heavy-Quark Diffusion Dynamics in Quark-Gluon Plasma under Strong Magnetic Fields

TL;DR

This paper analyzes how strong magnetic fields in quark-gluon plasma influence heavy-quark diffusion, revealing anisotropic behavior that affects elliptic flow, using advanced diagrammatic resummation techniques.

Contribution

It provides the first analytic calculation of anisotropic heavy-quark diffusion coefficients and drag forces in a magnetized quark-gluon plasma.

Findings

Diffusion coefficients become anisotropic in strong magnetic fields.

Heavy-quark elliptic flow is affected by magnetic field-induced anisotropy.

Analytic expressions for diffusion and drag are derived using resummation techniques.

Abstract

We discuss heavy-quark dynamics in the quark-gluon plasma under a strong magnetic field induced by colliding nuclei. By the use of the diagrammatic resummation techniques for Hard Thermal Loop and the external magnetic field, we show analytic results of heavy-quark diffusion coefficient and drag force which become anisotropic due to the preferred spatial orientation in the magnetic field. We argue that the anisotropic diffusion coefficient gives rise to an enhancement/suppression of the heavy-quark elliptic flow depending on the transverse momentum.