论文标题
LHC处PB-PB碰撞的横向动量依赖性去相关
Transverse momentum dependent decorrelation in Pb-Pb collisions at LHC
论文作者
论文摘要
基于多相传输（AMPT）模型模拟，在$ \ sqrt {s_ {nn}} $ = 2.76和5.02 tev中，已在PB-PB碰撞中研究了横向动量依赖性去相关。已经发现，混合阶分解比率$ r_ {m，n} $ value在非中性碰撞中显着偏离统一。随着$ p_ {t} $差$ p_ {t}^{a} -p_ {t}^{b} $的增加，这种效果变得更强大。这些去相关不仅在相同的顺序谐波之间，而且在不同顺序谐波之间，由于初始波动出现在不同的相位空间之间。还发现，涉及流量矢量较高功率的相关性产生更强的去字，$ r_ {m | n; 3} <r_ {m | n; 2} <r_ {m | n; 1}〜（m = 2,3; n = 2,3,4,5）$，除了加权因子$ $ r_ r_ r_;这些分解比率的破坏现象表明，它提供了研究重型离子碰撞的初始波动特性的可能观察结果。
Based on A Multi-Phase Transport (AMPT) model simulations, the transverse momentum dependent decorrelation has been studied in Pb-Pb collisions at $\sqrt{s_{NN}}$= 2.76 and 5.02 TeV, respectively. It has been found that the mix-order factorization ratio $r_{m, n}$ value deviates significantly from unity in noncentral collisions. Such effect becomes stronger with an increase in the $p_{T}$ difference $p_{T}^{a}-p_{T}^{b}$. These decorrelations are not only between the same order harmonic but also between the different order harmonic, which as a result of the initial fluctuations appear between the different phase spaces. It has also been found that the correlations involving higher powers of the flow vector yield stronger decorrelation, $r_{m|n;3}<r_{m|n;2}<r_{m|n;1}~(m=2,3; n=2,3,4,5)$, except for the weighted factorization ratio $r_{3|4;k}$. The breaking phenomenon of these factorization ratios indicated that it provides a possible observation for studying the initial fluctuation properties of heavy-ion collisions.
