Figure 4

Three-particle cumulants for p$-$p$-$p (left panel, blue square symbols) and p$-$p$-\Lambda$ (right panel) triplets obtained by subtracting the lower-order contributions from the measured three-particle correlation functions shown in Fig. 3. The p$-$p$-$p cumulant in the left panel is further corrected for the feed-down contributions from decaying particles and represents thus, the cumulant for the correctly identified primary protons (see Section 2.5 for details). The dashed lines correspond to the assumption that there are no genuine three-body correlations ${c}_3 (Q_3) = 0$. The red open circles in left panel represent the cumulant for p$-$p$-\overline{\rm p}$ triplets (for more details see the main text).