通过事件形状工程测试线性和非线性对高阶流谐波贡献的耦合强度的方法
A method to test the coupling strength of the linear and nonlinear contributions to higher-order flow harmonics via Event Shape Engineering
摘要：
多相输运（AMPT）模型用于研究形状工程事件的功效，以描绘对高阶流谐波$v_{4}$和$v_{5}$的线性和非线性贡献之间的耦合程度。研究表明，非线性的贡献是强烈的形状依赖性，而线性的贡献是形状无关的，表明很少，如果有的话，线性和非线性流量系数之间的耦合。这种模式的实验验证可能是一个宝贵的工具，用于强大的线性和模式耦合的流量系数提取，特别是对于带电粒子的多重性和事件统计排除使用当前的方法来建立耦合强度的光束能量。
英文摘要：
A Multi-Phase Transport (AMPT) model is used to study the efficacy of shape-engineered events to delineate the degree of coupling between the linear and nonlinear contributions to the higher-order flow harmonics $v_{4}$ and $v_{5}$. The study shows that the nonlinear contributions are strongly shape-dependent while the linear contributions are shape-independent, indicating little if any, coupling between the linear and nonlinear flow coefficients. The experimental verification of such patterns could be an invaluable tool for robust extraction of the linear and mode-coupled flow coefficients, especially for beam energies where the charged particle multiplicity and the event statistics precludes the use of current methods to establish the coupling strength.
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