The measurements of the (anti)deuteron elliptic flow (v2) and the first measurements of triangular flow (v3) in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision sNN = 5.02 TeV are presented. A mass ordering at low transverse momentum (pT) is observed when comparing these measurements with those of other identified hadrons, as expected from relativistic hydrodynamics. The measured (anti)deuteron v2 lies between the predictions from the simple coalescence and blast-wave models, which provide a good description of the data only for more peripheral and for more central collisions, respectively. The mass number scaling, which is violated for v2, is approximately valid for the (anti)deuterons v3. The measured v2 and v3 are also compared with the predictions from a coalescence approach with phase-space distributions of nucleons generated by iebe-vishnu with ampt initial conditions coupled with urqmd, and from a dynamical model based on relativistic hydrodynamics coupled to the hadronic afterburner smash. The model predictions are consistent with the data within the uncertainties in midcentral collisions, while a deviation is observed in the most central collisions.

中文翻译：

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sNN=5.02 TeV 时 Pb-Pb 碰撞中（反）氘核的椭圆和三角流

介绍了（反）氘核椭圆流 (v2) 的测量值和 Pb-Pb 碰撞中三角形流 (v3) 的首次测量值，每个核子-核子碰撞的质心能量 sNN = 5.02 TeV。正如相对论流体动力学所预期的那样，当将这些测量结果与其他已识别强子的测量结果进行比较时，观察到低横向动量 (pT) 下的质量排序。测得的（反）氘核 v2 介于简单聚结模型和爆炸波模型的预测之间，它们分别为更多外围和更多中心碰撞提供了对数据的良好描述。v2 违反的质量数缩放对（反）氘核 v3 近似有效。测得的 v2 和 v3 还与结合方法的预测进行了比较，该方法具有 iebe-vishnu 生成的核子的相空间分布，其中包含大量初始条件和 urqmd，以及基于相对论流体动力学的动力学模型与强子加力加力粉碎耦合. 模型预测与中心碰撞不确定性范围内的数据一致，而在大多数中心碰撞中观察到偏差。