$\eta/s-\hat{q}/T^3$ Relation at Next-to-Leading Order in QCD

Understand

The relation between the specific shear viscosity $\eta/s$ and the dimensionless jet quenching parameter $\hat{q}/T^3$ in perturbative QCD is explored at next-to-leading order in the coupling constant.

• It is shown that the relation changes little, although both transport coefficients independently are subject to large modifications at the NLO level.
• This finding confirms that the relationship is robust.