Related paper Measurement of jet quenching with semi-inclusive hadron-jet distributions in central Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV $\Delta I_{\rm{AA}}$, the ratio of $\Delta_\mathrm{recoil}$ in central Pb-Pb and pp collisions at $\sqrt{s}$ = 2.76 TeV, for ${R}$ = 0.2, 0.4 and 0.5. $\Delta_\mathrm{recoil}$ for pp collisions are calculated using PYTHIA. [png] [pdf] [png] [pdf] [png] [pdf]