小系统中集体行为的特征
Signatures of collective behavior in small systems
摘要：
本文对质子-核（PA）和核-核（AA）碰撞进行了3+ 1维粘性流体力学计算。我们的目标是了解最近在pA碰撞中观察到的明显的集体行为，并验证最高多重性碰撞系统是否可以准确地描述为相对论流体。我们比较我们的计算流量变量现有的测量，并证明流体力学正确地捕捉到测量的趋势。我们表明，我们的预测对相关观测$r_n$验证最近的实验PA测量，我们的结果是敏感的初始状态的粒度。我们还比较了我们的结果与核-核碰撞的测量。
英文摘要：
We perform 3+1D viscous hydrodynamics calculations of proton-nucleus (pA) and nucleus-nucleus (AA) collisions. Our goal is to understand the apparent collective behavior recently observed in pA collisions and to verify whether the highest multiplicity collision systems can be accurately described as a relativistic fluid. We compare our calculations of flow variables to existing measurements, and demonstrate that hydrodynamics correctly captures the measured trends. We show that our predictions for the pair correlation observable $r_n$ are validated by recent experimental pA measurements, and that our results are sensitive to the granularity of the initial state. We also compare our results with measurements done for nucleus-nucleus collisions.
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