Simulating Particle Production in Forward and Backward Regions in Nucleus-Nucleus Collisions at Dubna Energy

Abstract

This thesis is a theoretical investigation of the particles produced in Backward (BW) and Forward (FW) region in Nucleus-Nucleus ( N-N) collisions at high energy. Many models have been proposed to explain the properties of multiparticles in BW and FW region in the N-N interactions. One of these models is the hybrid model (HM) . The aim of this study is to verify the model's accuracy in describing the basic characteristics of particles formed in the BW and FW regions in the interactions of nuclei with emulsion at 4.1-4.5 A GeV/c, specifically, beams of 4.1 A GeV/c 22Ne and 4.5 A GeV/c 28Si , from Dubna Synchrophasotron. The characteristics of multiplicity for the particles produced in BW and FW region from the interaction of the both projectiles with Em and with the three groups of the target (H,CNO and AgBr) have been studied within the framework of HM. Moreover, the dependency of mean multiplicity of secondary charged particles on mass number of projectiles and target, have been also studied. In describing multiplicity distributions, the results are found to be consistent with the experimental data. also the angular distributions of secondary charged particles were analyzed according to HM. We found that the HM is agrees fairly with experimental data in describing multiplicity distributions and angular distributions. Finally, this theoretical study can provide a possibility to explain production mechanism of the particles produced in BW and FW region at high energy.