The feature study on the π and proton rapidity distributions at AGS, SPS and RHIC

• 来源期刊: 中国科学G辑（英文版）
• 年，卷（期）: 2009,（2）
• 页码范围: 198-206
• 页数: 9页
• 语种: 英文
• DOI: 10.1007/s11433-009-0035-z

摘要

The features of nuclear stopping power and multi-hadron production systematically are studied by making an analysis of rapidity distributions of pion and proton at AGS, SPS and RHIC in this work. It is found that nuclear stopping power increases linearly with project rapidity yp at AGS and SPS, but that is not liner at RHIC. It is argued that the average rapidity loss is saturated at central rapidity region at RHIC. For pion distribution, it is found that the phase space of pion distribution distributes uniformly in the longitudinal direction, and a linear relationship of <βγ>L with log√s is given at AGS and SPS. Non-uniform flow model may explain the features of the distribution at AGS and SPS, but may not explain those of at RHIC.