Top: $\delta^{\rm ch}_{p_{\rm T}}$ distribution for jets with resolution parameter $R=0.2$ and $R=0.3$ measured with random cones in central collisions. Bottom: Width of the background fluctuation $\delta^{\rm ch}_{p_{\rm T}}$ distribution as a function of centrality for cone radii $R=0.2$ and $R=0.3$. The shaded uncertainty bands indicate the difference between the width of the $\delta_{p^{\rm ch}_{\rm T}}$ distribution from random cones and high-$\pt$ probe embedding.