Dependence of particle rapidity distribution on forward energy and multiplicity in nucleus-nucleus collisions at AGS energy

摘要

The rapidity distributions of particles produced in nucleus-nucleus (Au-Au) collisions at the Alternating Gradient Synchrotron (AGS) energy (11-15A GeV) have been analyzed by the thermalized cylinder model and the three-fireball model. It is shown that the two models are successful at the AGS energy. The normalized rapidity distributions of produced parti- cles (exclusion of protons) described by the two models do not depend on the forward energy and multiplicity. The rapidity shifts in the two mod- els do not depend on the impact parameter.