Skewness of elliptic flow fluctuations

被引：48
|
作者：
Giacalone, Giuliano [1 ]
Yan, Li [1 ]
Noronha-Hostler, Jacquelyn [2 ]
Ollitrault, Jean-Yves [1 ]
机构：
[1] Univ Paris Saclay, CNRS, CEA, Inst Phys Theor, F-91191 Gif Sur Yvette, France
[2] Univ Houston, Dept Phys, Houston, TX 77204 USA
来源：
PHYSICAL REVIEW C | 2017年 / 95卷 / 01期
基金：
美国国家科学基金会; 欧洲研究理事会; 巴西圣保罗研究基金会;
关键词：
HEAVY-ION COLLISIONS; COLLECTIVE FLOW; ANISOTROPY;
D O I：
10.1103/PhysRevC.95.014913
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Using event-by-event hydrodynamic calculations, we find that the fluctuations of the elliptic flow (v(2)) in the reaction plane have a negative skew. We compare the skewness of v(2) fluctuations to that of initial eccentricity fluctuations. We show that skewness is the main effect lifting the degeneracy between higher-order cumulants, with negative skewcorresponding to the hierarchy v(2){4} > v(2){6} observed inPb+ Pb collisions at theCERNLarge Hadron Collider. We describe how the skewness can be measured experimentally and show that hydrodynamics naturally reproduces its magnitude and centrality dependence.
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页数：6
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