Extended Data Fig. 2: Impact of non-flow correlations.
From: Imaging shapes of atomic nuclei in high-energy nuclear collisions
The centrality dependence of Nch scaled quantities in Au+Au collisions, \(\langle {v}_{2}^{2}\rangle {N}_{{\rm{ch}}}\) (a), \(\langle {(\delta {p}_{{\rm{T}}})}^{2}\rangle {N}_{{\rm{ch}}}\) (b), and \(\langle {v}_{2}^{2}\delta {p}_{{\rm{T}}}\rangle {N}_{{\rm{ch}}}^{2}\) (c) from the standard method (black solid markers), two-subevent method (red solid markers) and their differences (open markers). The error bars are statistical uncertainties. The decrease of \(\langle {v}_{2}^{2}\rangle \)-difference towards central collisions is attributed to two-track reconstruction effects in the standard method, which does not affect the other two observables. The dashed lines indicate the upper limit of the non-flow contribution, assuming Nch-scaling of Eq. (10).
