流体动力膨胀sQGP各向异性的时间演化
Time evolution of the anisotropies of the hydrodynamically expanding sQGP
摘要：
在RHIC和LHC的高能重离子碰撞中，产生了强相互作用的夸克-胶子等离子体（sQGP）.这种介质在冻结形成强子物质之前经历了流体动力学演化。sQGP的初始态由参与核子的初始分布及其相互作用决定。由于核子的数量有限，初始分布在事件的基础上波动。初始状态的横向平面各向异性可以转化为一系列的各向异性系数或偏心率：第二，第三，第四阶各向异性等，然后这些各向异性演变的时间，并导致可测量的动量空间各向异性，相对于各自的对称平面进行测量。在本文中，我们研究的各向异性的时间演化。用数值流体动力学代码，我们分析了如何的声速和粘度的影响，这种演变。
英文摘要：
In high energy heavy ion collisions of RHIC and LHC, a strongly interacting quark gluon plasma (sQGP) is created. This medium undergoes a hydrodynamic evolution, before it freezes out to form a hadronic matter. The initial state of the sQGP is determined by the initial distribution of the participating nucleons and their interactions. Due to the finite number of nucleons, the initial distribution fluctuates on an event-by-event basis. The transverse plane anisotropy of the initial state can be translated into a series of anisotropy coefficients or eccentricities: second, third, fourth-order anisotropy etc. These anisotropies then evolve in time, and result in measurable momentum-space anisotropies, to be measured with respect to their respective symmetry planes. In this paper we investigate the time evolution of the anisotropies. With a numerical hydrodynamic code, we analyze how the speed of sound and viscosity influence this evolution.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
