Related paper Two-pion Bose-Einstein correlations in central Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV Product of the three pion HBT radii at $k_T$ = 0.3 GeV/$c$ The ALICE result (red filled dot) is compared to those obtained for central gold and lead collisions at lower energies at the AGS [35], SPS [36,37,38] and RHIC [39,40,41,42,30,43]. [png] [pdf]