Nuclear stopping and sideward-flow correlation from 0.35A to 200A GeV
Nuclear stopping and sideward-flow correlation from 0.35A to 200A GeV
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0.35A 至 200A GeV 的核停止和侧向流相关性
DOI：
10.1103/physrevc.78.031901
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发表时间：
2008-09
影响因子：
3.1
通讯作者：
中科院分区：
文献类型：
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作者：
在超相对论量子分子动力学 (UrQMD) 中研究了核停止与尺度不变核子侧向流之间的相关性，其能量范围从 GSI 重离子同步加速器 (SIS) 可用的能量到 CERN 超级质子同步加速器 (SPS) 的可用能量。发现各种碰撞系统和尺度影响参数的两个实验观测值的普遍行为彼此高度相关。由于UrQMD不涉及相变机制，这种相关性可能会因核物质整体性质的突然变化而被打破，例如夸克-胶子等离子体（QGP）的形成，它可以在高能重离子碰撞中用作QGP相变信号。此外，我们还指出，相关性崩溃的出现可能是寻找 QCD 相图临界点的有力工具。
The correlation between the nuclear stopping and the scale invariant nucleon sideward flow at energies ranging from those available at the GSI heavy ion synchrotron (SIS) to those at the CERN Super Proton Synchrotron (SPS) is studied within ultrarelativistic quantum molecular dynamics (UrQMD). The universal behavior of the two experimental observables for various colliding systems and scale impact parameters are found to be highly correlated with each other. As there is no phase transition mechanism involved in the UrQMD, the correlation may be broken down by the sudden change of the bulk properties of the nuclear matter, such as the formation of quark-gluon plasma (QGP), which can be employed as a QGP phase transition signal in high-energy heavy ion collisions. Furthermore, we also point out that the appearance of a breakdown of the correlation may be a powerful tool for searching for the critical point on the QCD phase diagram.