In this paper, we continue our phenomenological studies of heavy-ion collisions using 3+1d anisotropic hydrodynamics (aHydro). In previous works, we compared quasiparticle aHydro (aHydroQP) with ALICE 2.76 TeV Pb-Pb and RHIC 200 GeV Au-Au collision results. At both energies, the agreement was quite good between aHydroQP and the experimental data for many observables. In this work, we present comparisons of the Hanbury Brown--Twiss (HBT) radii and their ratios determined using pi+ pi+ pairs produced in 200 GeV Au-Au collisions. We first present comparisons with STAR results for the HBT radii and their ratios. We then present comparisons with PHENIX results for the HBT radii and their ratios. In both cases, we find reasonable agreement between aHydroQP predictions and available experimental results for the ratios of HBT radii. At the level of the radii themselves, in some cases quantitative differences on the order of 10-20% remain, which deserve further study.

中文翻译：

---

使用各向异性流体动力学在 200 GeV 下进行 Pion 干涉测量

在本文中，我们继续使用 3+1d 各向异性流体动力学 (aHydro) 对重离子碰撞进行现象学研究。在之前的工作中，我们将准粒子 aHydro (aHydroQP) 与 ALICE 2.76 TeV Pb-Pb 和 RHIC 200 GeV Au-Au 碰撞结果进行了比较。在这两种能量下，aHydroQP 与许多可观测的实验数据之间的一致性非常好。在这项工作中，我们比较了 Hanbury Brown-Twiss (HBT) 半径及其使用 200 GeV Au-Au 碰撞中产生的 pi+pi+ 对确定的比率。我们首先将 HBT 半径及其比值与 STAR 结果进行比较。然后，我们将 HBT 半径及其比率与 PHENIX 结果进行比较。在这两种情况下，我们发现 aHydroQP 预测与 HBT 半径比的可用实验结果之间存在合理的一致性。