A Multi-Phase Transport (AMPT) model is used to study the elliptic flow fluctuations of identified particles using participant and spectator event planes. The elliptic flow measured using the first order spectator event plane is expected to give the elliptic flow relative to the true reaction plane which suppresses the flow fluctuations. However, the elliptic flow measured using the second-order participant plane is expected to capture the elliptic flow fluctuations. Our study shows that the first order spectator event plane could be used to study the elliptic flow fluctuations of the identified particles in the AMPT model. The elliptic flow fluctuations magnitude shows weak particle species dependence and transverse momentum dependence. Such observation will have important implications for understanding the source of the elliptic flow fluctuations.

中文翻译：

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使用多相输运模型研究已识别颗粒的椭圆流波动

多相传输（AMPT）模型用于使用参与者和观众事件平面研究已识别粒子的椭圆流动波动。期望使用一阶观众事件平面测量的椭圆流相对于真实反应平面产生椭圆流，从而抑制了流量波动。但是，使用二阶参与平面测量的椭圆流有望捕获椭圆流波动。我们的研究表明，一阶观众事件平面可用于研究AMPT模型中已识别颗粒的椭圆流动波动。椭圆流量波动幅度显示出较弱的颗粒种类依赖性和横向动量依赖性。