Rapidity decorrelation of anisotropic flow caused by hydrodynamic fluctuations
Rapidity decorrelation of anisotropic flow caused by hydrodynamic fluctuations
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DOI：
10.1103/physrevc.102.064903
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发表时间：
2020-03
期刊：
影响因子：
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通讯作者：
A. Sakai;K. Murase;Tetsufumi Hirano
中科院分区：
文献类型：
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作者：
A. Sakai;K. Murase;Tetsufumi Hirano
我们使用 (3+1) 维集成动力学模型研究了水动力波动对高能核碰撞中各向异性流的快速去相关的影响。集成动力学模型由扭曲的初始条件、波动流体动力学和逐个事件的强子级联组成。为了理解快速去相关性，我们分析纵向的因式分解比率。比较脉动流体动力学和普通粘性流体动力学之间的因式分解比率，我们发现流体动力学脉动对快速去相关性有相当大的影响。我们还建议计算流动幅度和事件平面角度的勒让德系数，以了解纵向各向异性流动的去相关性。
We investigate the effect of hydrodynamic fluctuations on the rapidity decorrelations of anisotropic flow in high-energy nuclear collisions using a (3+1)-dimensional integrated dynamical model. The integrated dynamical model consists of twisted initial conditions, fluctuating hydrodynamics, and hadronic cascades on an event-by-event basis. To understand the rapidity decorrelation, we analyze the factorization ratio in the longitudinal direction. Comparing the factorization ratios between fluctuating hydrodynamics and ordinary viscous hydrodynamics, we find a sizable effect of hydrodynamic fluctuations on rapidity decorrelations. We also propose to calculate the Legendre coefficients of the flow magnitude and the event-plane angle to understand the decorrelation of anisotropic flow in the longitudinal direction.