Werner Klaus
SUBATECH, University of Nantes-IN2P3/CNRS-EMN, Nantes 44000, France.
Phys Rev Lett. 2007 Apr 13;98(15):152301. doi: 10.1103/PhysRevLett.98.152301. Epub 2007 Apr 10.
Simple geometrical considerations show that the collision zone in high energy nuclear collisions may be divided into a central part ("core"), with high energy densities, and a peripheral part ("corona"), with smaller energy densities, more like in pp or pA collisions. We present calculations that allow us to separate these two contributions, and which show that the corona contribution is quite small (but not negligible) for central collisions, but gets increasingly important with decreasing centrality. We will discuss consequences concerning results obtained in heavy ion collisions at the BNL Relativistic Heavy Ion Collider and CERN Super Proton Synchrotron.
简单的几何分析表明，高能核碰撞中的碰撞区域可分为能量密度较高的中心部分（“核心”）和能量密度较小的外围部分（“晕”），这更类似于质子-质子或质子-原子核碰撞中的情况。我们进行了一些计算，这些计算使我们能够区分这两种贡献，并且结果表明，对于中心碰撞，晕的贡献相当小（但并非可以忽略不计），但随着碰撞中心度的降低，其重要性会日益增加。我们将讨论在布鲁克海文国家实验室相对论重离子对撞机和欧洲核子研究中心超级质子同步加速器上进行的重离子碰撞所获得结果的相关影响。
