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arXiv 1607.01732nucl-thhep-phnucl-ex
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逐事件波动重离子碰撞中流体动力流振幅相关

Hydrodynamic flow amplitude correlations in event-by-event fluctuating heavy-ion collisions

Jing Qian, Ulrich Heinz

备注：
v2: reference and some additional discussion added. No change in conclusions
发表信息：
Phys. Rev. C 94, 024910 (2016)
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摘要：

在相对论性重离子碰撞中，碰撞核初始几何中的逐事件涨落效应对最终流观测值的分析具有重要意义。我们使用流体动力学模拟来研究不同阶次的事件的波动各向异性流谐波之间的振幅相关性。虽然在实验数据中看到的一般趋势是定性再现的模型，详细的偏差，特别是外围碰撞，指出需要更详细的未来计算与混合的方法，描述了后期强子阶段的演化微观。它明确表明，所观察到的反相关之间的$v_2$和$v_3$是近似线性的流体动力学响应的结果，相应的初始偏心率$ε_2$和$ε_3$类似的反相关。对于$n{\,>\,}3$，$v_{2,3}$和$v_n$之间的流体动力学关联偏离了相应初始偏心率之间的重新标度关联，表明高阶流动中的非线性模式耦合效应。

英文摘要：

The effects of event-by-event fluctuations in the initial geometry of the colliding nuclei are important in the analysis of final flow observables in relativistic heavy-ion collisions. We use hydrodynamic simulations to study the amplitude correlations between different orders of event-by-event fluctuating anisotropic flow harmonics. While the general trends seen in the experimental data are qualitatively reproduced by the model, deviations in detail, in particular for peripheral collisions, point to the need for more elaborate future calculations with a hybrid approach that describes the late hadronic stage of the evolution microscopically. It is demonstrated explicitly that the observed anti-correlation between $v_2$ and $v_3$ is the consequence of approximately linear hydrodynamic response to a similar anti-correlation of the corresponding initial eccentricities $ε_2$ and $ε_3$. For $n{\,>\,}3$, the hydrodynamic correlations between $v_{2,3}$ and $v_n$ deviate from the rescaled correlations among the corresponding initial eccentricities, demonstrating nonlinear mode coupling effect in higher order flows.

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。

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