Measurements of Centrality in Nucleus–Nucleus Collisions at the BM@N Experiment

One of the actual tasks in the analysis of already collected data at the BM@N experiment is a classification of events according to their centrality using the energy of projectile spectators measured with the ZDC. The experimental problems and proposed approaches to determine event centrality are discussed. A new approach, based on machine learning techniques, for centrality determination with a new FHCal in future heavy ion experiments is proposed and simulation results are shown for Au + Au collision of 4.5 AGeV. The FHCal calibration procedure with cosmic muons as well as its preliminary results are presented.