Holographic energy loss near critical temperature in an anisotropic background

TL;DR

This paper investigates how anisotropy in a strongly coupled quark-gluon plasma affects energy loss mechanisms of a moving quark, revealing increased jet quenching and drag forces near the critical temperature, with anisotropy directionality playing a significant role.

Contribution

It introduces a holographic model to analyze anisotropic effects on quark energy loss, highlighting the impact of anisotropy parameter and orientation relative to the anisotropy.

Findings

Drag force and jet quenching increase with anisotropy parameter A.

Diffusion coefficient decreases as anisotropy increases.

Energy loss is more significant when moving perpendicular to anisotropy direction.

Abstract

We study the energy loss of a quark moving in a strongly coupled QGP under the influence of anisotropy. The heavy quark drag force, diffusion coefficient, and jet quenching parameter are calculated using the Einstein-Maxwell-dilaton model, where the anisotropic background is characterized by an arbitrary dynamical parameter $A$.Our findings indicate that as the anisotropic factor $A$ increases, the drag force and jet quenching parameter both increase, while the diffusion coefficient decreases. Additionally, we observe that the energy loss becomes more significant when the quark moves perpendicular to the anisotropy direction in the transverse plane.The enhancement of the rescaled jet quenching parameters near critical temperature $T_c$, as well as drag forces for a fast-moving heavy quark is observed, which presents one of the typical features of QCD phase transition.