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The origin of weakly bound objects like clusters and hypernuclei, observed inheavy-ion collisions, is of theoretical and experimental interest. It is in thefocus of the experiments at RHIC and LHC since it is not evident how suchweakly bound objects can survive in an environment whose hadronic decayproducts point to a temperature of the order of 150 MeV. It is as well one ofthe key research topics in the future facilities of FAIR and NICA which areunder construction in Darmstadt (Germany) and Dubna (Russia), respectively. Wepresent here first results on the cluster dynamics within the model-independentcluster recognition library "phase-space Minimum Spanning Tree" (psMST) appliedto different transport approaches: PHQMD, PHSD, SMASH and UrQMD. The psMST isbased on the "Minimum Spanning Tree" (MST) algorithm for the clusterrecognition which exploits correlations in coordinate space, and it is extendedto correlations of baryons in the clusters in momentum space. We show thesensitivity of the cluster formation on the microscopic realization of then-body dynamics and on the potential interactions in heavy-ion collisions.

Cluster dynamics studied with the phase-space Minimum Spanning Tree approach