Within an advanced Langevin-hydrodynamics framework coupled to a hybrid fragmentation-coalescence hadronization model, we study heavy flavor quenching and flow in relativistic heavy-ion collisions. We investigate how the initial heavy quark spectrum, the energy loss and hadronization mechanisms of heavy quarks in medium, the evolution profile of pre-equilibrium stage, the flow of medium and the temperature dependence of heavy quark diffusion coefficient influence the suppression and elliptic flow of heavy mesons at RHIC and the LHC. Our result shows that different modeling of initial conditions, pre-equilibrium evolution and in-medium interaction can individually yield about 10-40% uncertainties in D meson suppression and flow at low transverse momentum. We also find that a proper combination of collisional versus radiative energy loss, coalescence versus fragmentation in hadronization, and the inclusion of medium flow are the most important factors for describing the suppression and elliptic flow of heavy mesons.

中文翻译：

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重味猝灭和流动：初始条件、平衡前演化和介质内相互作用的作用

在与混合碎裂-聚结强子化模型耦合的先进朗之万-流体动力学框架内，我们研究了相对论重离子碰撞中重味猝灭和流动。我们研究了初始重夸克谱、介质中重夸克的能量损失和强子化机制、预平衡阶段的演化曲线、介质的流动和重夸克扩散系数的温度依赖性如何影响抑制和椭圆流。 RHIC 和 LHC 的重介子。我们的结果表明，初始条件、平衡前演化和介质内相互作用的不同建模可以单独产生约 10-40% 的 D 介子抑制和低横向动量下的流动的不确定性。我们还发现，碰撞能量损失与辐射能量损失的适当组合，