论文标题
倾斜火球中椭圆流的分裂
Splitting of elliptic flow in a tilted fireball
论文作者
论文摘要
最近已经在传输模型中研究了在生产的哈子的动量空间的不同区域中测得的椭圆流的分裂，并提议是对相对论重离子碰撞产生的火球携带的角动量的敏感探针。初始态角动量还引起了已测量的速度奇数向定向流动。我们考虑了一个相对论的流体动力框架，其初始物质分布适当校准以描述观察到的定向流，并将其应用于椭圆流中的溢出。我们的研究表明，椭圆流中的分裂主要由定向和三角形流动，可用于约束火球中物质的初始状态快速分布模型。
The splitting of elliptic flow measured in different regions of the momentum space of produced hadrons has been recently studied in transport models and proposed as a sensitive probe of the angular momentum carried by the fireball produced in a relativistic heavy ion collision. The initial state angular momentum also gives rise to rapidity odd directed flow which has been measured. We consider a relativistic hydrodynamic framework with the initial matter distribution suitably calibrated to describe the observed directed flow and apply it to study the spilt in the elliptic flow. Our study suggests that the split in the elliptic flow is mostly driven by directed and triangular flows and may be used to constrain models of initial state rapidity distribution of matter in the fireball.
