论文标题
探索椭圆形和三角形流的中心性依赖性
Exploring the centrality dependence of elliptic and triangular flows
论文作者
论文摘要
提出了对相对论重离子碰撞最初状态中椭圆形和三角偏心率的详细研究。基于颜色玻璃冷凝物的有效理论，使用了横向平面中能量密度的随机分布源模型。该模型很好地描述了在质量中心能量中的PB+PB碰撞的爱丽丝和地图集的数据，如果第二$ v_2 $和第三$ v_2 $和第三$ v_3 $谐波的和varepsilon_ varepsilon_2 $ \ vareps和$ \ 3 $ \ varepsim a v y a v ailpsimal a v _2 $和第三$ v_3 $谐波，则在质量中心能量为5.02 tev tev。偏心$ \ varepsilon_2 $与碰撞几何形状密切相关，其中心性依赖性主要取决于即将到来的核的饱和脉冲的均匀分布区域的边缘扩散性。偏心$ \ varepsilon_3 $完全取决于重叠核区域中源位置的混乱波动，并且仅取决于重叠面积。
A detailed study of elliptical and triangular eccentricities in the initial state of relativistic heavy ion collisions is presented. A model of randomly distributed sources of energy density in the transverse plane based on the effective theory of Color Glass Condensate is used. This model describes well the ALICE and ATLAS data for Pb+Pb collisions at center-of-mass energy 5.02 TeV per nucleon pair in a wide range of centralities, if the second $v_2$ and third $v_3$ harmonics of the anisotropic flow are simply implied to be proportional to the eccentricities $\varepsilon_2$ and $\varepsilon_3$ as a reasonable approximation. The eccentricity $\varepsilon_2$ is closely related with the collision geometry and its centrality dependence is mainly determined by the edge diffuseness of the region of the uniform distribution of the saturation pulse of the oncoming nucleus. The eccentricity $\varepsilon_3$ is completely determined by the chaotic fluctuations of the source position in the region of overlapping nuclei and is substantially dependent on the overlap area only.
