论文标题
在高能量时，温度和动力学冻结体积对Au-Au和PB-PB碰撞的中心性的依赖性
Dependence of temperatures and kinetic freeze-out volume on centrality in Au-Au and Pb-Pb collisions at high energy
论文作者
论文摘要
在中部（伪cl）中，核碰撞中的速度差异间隔在标准分布中分析了核碰撞的速度间隔。研究了在大型强子撞机（LHC）的爱丽丝协作中，在相对论重离子对撞机（RHIC）和铅铅（PB-PB）碰撞中测得的实验数据。从拟合到横向动量光谱中提取有效温度，初始温度，动力学冻结温度，横向流速和动力学冻结体积。我们观察到，由于平均横向动量随事件中心性的增加而增加，上述五个数量随事件中心性的增加而增加。这使得中心性发生了更大的动力（能量）转移和进一步的多散射。
Centrality-dependent double-differential transverse momentum spectra of negatively charged particles ($π^-$, $K^-$ and $\bar p$) at mid-(pseudo)rapidity interval in nuclear collisions are analyzed by the standard distribution in terms of multi-component. The experimental data measured in gold-gold (Au-Au) collisions by the PHENIX Collaboration at the Relativistic Heavy Ion Collider (RHIC) and in lead-lead (Pb-Pb) collisions by the ALICE Collaboration at the Large Hadron Collider (LHC) are studied. The effective temperature, initial temperature, kinetic freeze-out temperature, transverse flow velocity and kinetic freeze-out volume are extracted from the fitting to transverse momentum spectra. We observed, that the mentioned five quantities increase with the increase of event centrality due to the fact that the average transverse momentum increases with the increase of event centrality. This renders that larger momentum (energy) transfer and further multiple-scattering had happened in central centrality.
