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arXiv 2007.04209nucl-thhep-ph
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利用各向异性流体力学在200 GeV进行π介子干涉测量

Pion interferometry at 200 GeV using anisotropic hydrodynamics

Mubarak Alqahtani, Michael Strickland

摘要:

本文利用3+ 1维各向异性流体力学(aHydro)方法,继续对重离子碰撞进行唯象研究。在以前的工作中,我们比较了准粒子aHydro(aHydroQP)与ALICE 2.76 TeV Pb-Pb和RHIC 200 GeV Au-Au碰撞结果。在这两种能量下,aHydroQP与许多可观测值的实验数据之间的一致性非常好。在这项工作中,我们提出了比较的Hanbury布朗-Twiss(HBT)的半径和它们的比例确定使用π + π +对产生的200 GeV的金-金碰撞。我们首先提出比较与STAR的结果的HBT半径和它们的比率。然后,我们提出了与PHENIX的HBT半径和它们的比率的结果进行比较。在这两种情况下,我们发现合理的协议之间的aHydroQP预测和现有的实验结果的比率的HBT半径。在半径本身的水平上,在某些情况下,数量上的差异仍然存在10-20%的数量级,这值得进一步研究。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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