论文标题
$ \ sqrt {s _ {\ rm nn}} $ = 5.02 tev tev
Transverse momentum decorrelation of the flow vector in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV
论文作者
论文摘要
各向异性流量载体，流动角和流量幅度波动的各个研究提供了对在高能重型离子碰撞中产生的夸克 - 网状等离子体（QGP）的初始条件和特性的见解。这些波动的最新测量值已经可用，与流体动力学模型的比较显示了对系统初始条件的独特敏感性，但对特定的剪切粘度$η/s $的依赖也令人困惑。在本文中，使用初始条件的不同调谐，党横截面和规格的相互作用进行了多相传输（AMPT）模型的系统研究，研究了$ p _ {\ rm t} $ - 依赖性流动矢量，流量角度和流量幅度波动。发现传输模型合理地描述了在数据中观察到的流量矢量，流角和流量幅度的波动，并且波动是由初始状态的波动驱动的。本文介绍的数据和模型的比较对重离子碰撞的初始条件进行了进一步的限制。
The individual studies of the anisotropic flow vector, flow angle and flow magnitude fluctuations with multi-particle correlations provide insight into the initial conditions and properties of the quark-gluon plasma (QGP) created in high-energy heavy-ion collisions. Recent measurements of these fluctuations have been available and the comparison to hydrodynamic models shows unique sensitivities to the initial conditions of the system, but also a puzzling dependence on the specific shear viscosity $η/s$. In this paper, a systematic study with A Multi-Phase Transport (AMPT) model using different tunings of the initial conditions, partonic cross section and hadronic interactions investigates the $p_{\rm T}$-dependent flow vector, flow angle and flow magnitude fluctuations. It is found that the transport model reasonably describes the flow vector, flow angle and flow magnitude fluctuations observed in data and that the fluctuations are driven by fluctuations in the initial state. The comparison of data and model presented in this paper enables further constraints on the initial conditions of the heavy-ion collisions.
