Three-particle cumulants for \pppCF (left panel, blue square symbols) and \ppLCF (right panel) triplets obtained by subtracting the lower-order contributions from the measured three-particle normalised mixed moments shown in Fig. \ref{fig:nMM}. The \pppCF 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 \ref{sec:decomposition} for details). The dashed lines correspond to the null-hypotheses ${c}_3 (Q_3) = 0$. The red open circles in left panel represent the cumulant for \pppbarCF triplets (for more details see the main text)..