Selected Experimental Results from Heavy-Ion Collisions at LHC

Figure 13

(Color online) The ratio 𝑅_𝑣(2−4)=(𝑣₂{2}²−𝑣₂{4}²)/(𝑣₂{2}²+𝑣₂{4}²), an estimate of 𝑣₂ fluctuations plotted as a function of collision centrality (a) and ⟨𝑑𝑁_ch/𝑑𝜂⟩ (b) for RHIC (STAR experiment: Au+Au collisions at √𝑠_NN=200 GeV [110]) and LHC (ALICE: Pb+Pb collisions at √𝑠_NN=2.76 TeV [107]) at midrapidity. The bands reflect the systematic errors.

(a)

(b)