SPS能区200GeV下非对称碰撞末态强子的快度分布  

Study of Rapidity Distributions of the Charged-hadrons at 200 GeV per Nucleon at SPS

作　　者：王朝稳[1] 冯笙琴[1] 

机构地区：[1]三峡大学理学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2011年第6期102-105,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金项目(10975091);湖北省教育厅科学技术研究重大项目(Z20081302)

摘　　要：本文用热组分模型系统研究了SPS能区每核子能量200GeV下p-、d-、O-和S-nucleus等非对称碰撞系统的末态强子的净质子分布和带电强子的快度分布特征,讨论了非对称碰撞系统在中心区、射弹碎裂区和靶碎裂区粒子分布情况.中心区域形成集体流达到热化.We make quantitative description for the rapidity of charged-hadron multiplicity in proton-, deuter- on-, oxygen- and sulphur-nucleus collisions at 200 GeV per nucleon by using the thermalization component model （TCM）. It is found that the total multiplicity distribution is the sum of the contributions from the target fragmentation region, the projectile fragmentation region, and the central rapidity region. It is realized that the collective flow has been formed and the thermalization has been reached at the central rapidity region. And then, charged particle（net protons-p-p, negatively charged hadrons- h-） distributions ions are studied, which can help us to understand the transport mechanism of valence quarks.

关 键 词：热组分模型 SPS 快度分布 非对称碰撞 

分 类 号：O572.2[理学—粒子物理与原子核物理]