Studies of target-evaporated particle production in forward and backward hemispheres in ~(16)O-emulsion interactions at 60A and 200A GeV

摘要

The multiplicity distribution of the target-evaporated black particles emitted in the interactions of ~(16)O beams with emulsion nuclei at 60A and 200A GeV in both the forward and backward hemispheres are examined. The asymmetry parameters, the forward-backward ratios as well as multiplicity distribution moments are evaluated. The investigated scaled variances and the second Mueller moments are observed to indicate the strongly correlated emission of target-evaporated black particles in the forward direction. The ratio of entropy to average multiplicity of target fragments is evaluated, and is found to be energy-independent in both the forward and backward hemispheres.