Axial charge fluctuation and chiral magnetic effect from stochastic hydrodynamics

Shu Lin, Li Yan, and Gui-Rong Liang
Phys. Rev. C 98, 014903 – Published 6 July 2018

Abstract

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 μ5 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 μ5 set by the thermodynamic limit for chiral magnetic effect and a background from parity-even v1, we obtain a reasonable description of the centrality dependence of charged particle correlation measured in experiment.

  • Figure
  • Received 27 February 2018

DOI:https://doi.org/10.1103/PhysRevC.98.014903

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Shu Lin1,*, Li Yan2,†, and Gui-Rong Liang1,‡

  • 1School of Physics and Astronomy, Sun Yat-Sen University, Zhuhai, 519082, China
  • 2Department of Physics, McGill University, 3600 rue University, Montréal, QC H3A 2T8, Canada

  • *linshu8@mail.sysu.edu.cn
  • li.yan@physics.mcgill.can
  • bluelgr@sina.com

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Issue

Vol. 98, Iss. 1 — July 2018

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