相对论重离子碰撞的纵向流分布与碰撞能量关系的研究

Analysis of Dependence of Longitudinal Collective Flow on Collision Energies in Relativistic Heavy-Ion Collisions

利用相对论纵向非均匀集体流模型 ,讨论较大的碰撞系统 (Au Au和Pb Pb作用 )分别在AGS、SPS和RHIC能区的重子纵向集体流分布特征 .发现 :能量越高 ,纵向流的非均匀分布特征越强 ,即在最新的RHIC能区所产生的粒子系统具有很强的非均匀分布特征 ,表现为很强的核透明性 .这一研究不仅可以帮助了解最新的RHIC能区的粒子分布特征 。

The distribution features of longitudinal collective flow at AGS、SPS and RHIC with larger Au-Au or Pb-Pb collision system are discussed by introducing non-uniform collective flow model.It is found that the higher of the collision energy, the stronger of the non-uniform feature of the collective flow in the longitudinal direction.The distributions of produced particles of the newest RHIC energy show the strongest non-uniform flow feature, which means the strongest transparency at the highest RHIC collision energy. These researches help us to understand not only the feature of particle distributions, but also the dependences of collective flow distributions on the collision energy.