Study of the Interaction Trigger for Au + Au Collisions in BM@N Experiment

The work is devoted to simulation of the characteristics of trigger detectors and the efficiency of the interaction trigger as a part of the upgarde program of the BM@N facility for study Au + Au collisions. The study is carried out using the DCM-QGSM + GEANT4 code-based simulation. Recommendations for changing the geometry of the target zone of detectors in order to suppress the background from δ-electrons are given. It is shown that the inclusion of information from the detector of fragments of the beam nuclei and the hadron calorimeter into the trigger of the fast interaction provides a more reliable selection of events by centrality.