论文标题
$ p_t $依赖性多重性波动来自PCA和初始条件
$p_T$-dependent multiplicity fluctuations from PCA and initial conditions
论文作者
论文摘要
我们提供了用于流体动力模拟的主成分分析，并与CMS实验数据进行比较。虽然结果对于各向异性流是合理的，但对于多重性波动而言，它们在质上有所不同。我们认为，这是由于模拟中的横向动量（$ p_t $）的波动太大，而$ n-p_t $ sovariance造成的。反过来，这与初始尺寸的波动太大有关。
We present a Principal Component Analysis for a hydrodynamic simulation and compare with CMS experimental data. While the results are reasonable for anisotropic flow, for multiplicity fluctuations they are qualitatively different. We argue that this is due to too large transverse momentum ($p_T$) fluctuations and $N-p_T$ covariance in the simulation than seen experimentally. In turn this is related to too large initial size fluctuations.
