质心能量200 GeV下d+Au碰撞中末态强子的赝快度分布研究

Study of Pseudorapidity Distributions of Charged-hadrons in d+Au Collision at sNN^(1/2)=200 GeV

利用热化组分模型详细讨论了RHIC能区不同中心度d+Au产生的带电粒子赝快度分布.并把产生粒子的贡献归纳为射弹碎裂区、中心区和靶碎裂区3部分粒子贡献总和,中心区域形成集体流达到热化.并由此分析了RHIC能区d+Au相互作用不同中心度粒子产生特性.

We make quantitative description for the pseudorapidity and centrality dependencies of charged-hadron pseudorapidity in d＋Au collision at the RHIC energy by using the thermalization component model（TCM）.It is found that the total pseudorapidity 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 collective flow has been formed and the thermalization has been reached at the central rapidity region.The distribution behavior of particle production at different centrality of d＋Au collisions at RHIC are studied.