Transverse spherocity is an event shape observable having a unique capability to separate the events based on their geometrical shapes. Recent results from experiments at the LHC suggest that transverse spherocity is an important event classifier in small collision systems. In this work, we use transverse spherocity for the first time in heavy-ion collisions and perform an extensive study on azimuthal anisotropy of charged particles produced in Pb–Pb collisions at TeV using a multi-phase transport model (AMPT). The azimuthal anisotropy is estimated using the two-particle correlation method, which suppresses the non-flow effects significantly with an appropriate pseudorapidity gap of particle pairs. The results from AMPT are compared with estimations from PYTHIA8 (Angantyr) model and it is found that with the chosen pseudorapidity gap, the residual non-flow effects become negligible. We found that the high spherocity events have nearly zero elliptic flow while low spherocity events contribute significantly to elliptic flow of spherocity-integrated events.

横向球形度是一种可观察的事件形状，具有根据事件的几何形状分离事件的独特能力。来自 LHC 实验的最新结果表明，横向球形度是小型碰撞系统中的一个重要事件分类器。在这项工作中，我们首次在重离子碰撞中使用横向球形度，并对 Pb-Pb 碰撞中产生的带电粒子的方位各向异性进行了广泛的研究。TeV 使用多相传输模型 (AMPT)。方位各向异性是使用两粒子相关方法估计的，该方法通过适当的粒子对伪快速间隙显着抑制了非流动效应。将 AMPT 的结果与 PYTHIA8 (Angantyr) 模型的估计值进行比较，发现在选定的伪快速间隙下，剩余的非流动效应变得可以忽略不计。我们发现高球度事件的椭圆流几乎为零，而低球度事件对球度整合事件的椭圆流贡献显着。