Effective running coupling constant and jet quenching parameter in the spinning background from holography

TL;DR

This paper investigates how angular momentum in a holographic spinning background affects the effective running coupling constant and jet quenching parameter, revealing suppression and enhancement effects relevant for quarkonium dissociation and jet energy loss.

Contribution

It provides a novel holographic analysis of the impact of angular momentum on quark-gluon plasma properties, specifically the running coupling and jet quenching parameters.

Findings

Angular momentum suppresses the effective running coupling constant.

Angular momentum enhances the jet quenching parameter.

Effects are stronger when the quarkonium axis or jet direction is transverse to the angular momentum.

Abstract

In this work, we study the effective running coupling constant of heavy quark pair and jet quenching parameter in the spinning background. Ultra-locally, the boosted fluid is described by the boosted parameter and dual to a globally rotating system. Our results show that the angular momentum suppresses the effective running coupling constant and reduces its maximum value. The results demonstrate that the angular momentum promotes the dissociation of quarkonium and has a stronger effect on the effective running coupling constant when the axis of $Q\overline{Q}$ is transverse to the direction of the angular momentum. We also find that the angular momentum enhances the jet quenching parameter and has a stronger effect when the jet moves transversely to the direction of the angular momentum, namely $\hat{q}_{\perp}> \hat{q}_{\parallel}$. We discuss the dependence of the jet quenching parameter on the $\eta/s$ at strong coupling in the presence of the angular momentum.