Figure 1

Two-particle per-trigger yield measured for charged track pairs with $1<\pttrig<2\,\GeVc$ and $1<\ptassoc<2\,\GeVc$ within the multiplicity range $32 < N_\mathrm{ch} \leq 37$. The jet fragmentation peak has been truncated to ensure a better visibility of the long-range structure. The right panel shows the zero-suppressed projection to $\dPhi$ overlaid with $F(\Updelta\varphi)$ (red line) and the area in which the ridge yield is extracted (shaded area). The blue and purple lines represent the second and third harmonic terms of $F(\Updelta\varphi)$.