Multiplicity characteristics of forward-backward emitted particles in heavy ion interactions with emulsion nuclei at (4-1 - 4.5) A GeV/c

A systematic study has been carried out for the multiplicity characteristics of the emitted hadrons (relativistic and fast) in forward (θomicron≤ 90) and backward (θomicron> 90) (hemispheres in the interactions of 6Li, '12C, 22Ne and 28Si projectiles nuclei with emulsion nuclei at momentum (4.1 - 4.5) A Ge V/c. The average multiplicities of the different emitted hadrons (shower and grey) in the forward and backward hemispheres have been studied a function of projectile mass number, number of interacting projectile nucleons, impact parameter and number of shower particles emitted in the backward hemisphere. The correlations between various groups of particles emitted in forward and backward hemispheres have been presented. The analysis of the experimental data shows a strong dependence of the average multiplicity of the emitted forward shower particles (N) on the incident projectile size while the average multiplicities of the emitted shower particles in the backward hemisphere are projectile independent. The correlations between the different types of particles emitted in the forward and backward hemispheres have been investigated. The detailed comparison of the experimental data to the FRITIOF model based on the picture of independent fragmenting strings have been made and a reasonable agreement has been found