Axial charge fluctuation and chiral magnetic effect from stochastic hydrodynamics

被引：20

作者：

Lin, Shu ^{[1
]}

Yan, Li ^{[2
]}

Liang, Gui-Rong ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China

[2] McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada

来源：

PHYSICAL REVIEW C | 2018年 / 98卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

HEAVY-ION COLLISIONS; VIOLATION; SPHALERONS; SEPARATION; TRANSPORT; DYNAMICS; EVENT;

D O I：

10.1103/PhysRevC.98.014903

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：

The amount of axial charge produced in heavy ion collisions is one of the key quantities in understanding chiral magnetic effect. Current phenomenological studies assume large axial charge chemical potential mu(5) produced in Glasma phase and assume the conservation of axial charge throughout the evolution, which is valid in the long relaxation time limit. Based on the solution of stochastic hydrodynamics with phenomenological parameters, our study suggests that the situation of heavy ion collisions may be close to the opposite limit, in which axial charge fluctuation approaches thermodynamic limit. Using mu(5) set by the thermodynamic limit for chiral magnetic effect and a background from parity-even v(1), we obtain a reasonable description of the centrality dependence of charged particle correlation measured in experiment.

引用

页数：9

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