  In our analysis, we combine event-by-event hydrodynamics, within the EKRT
formulation, with jet quenching -ASW Quenching Weights- to obtain high-$p_T$
$R_{\rm AA}$ for charged particles at RHIC and LHC energies for different
centralities. By defining a $K$-factor that quantifies the departure of
$\hat{q}$ from an ideal estimate, $K = \hat{q}/(2\epsilon^{3/4})$, we fit the
single-inclusive experimental data for charged particles. This $K$-factor is
larger at RHIC than at the LHC but, surprisingly, it is almost independent of
the centrality of the collision.
