2018/02/14 by Shu Lin, Li Yan, Gui-Rong Liang
Physics and Astronomy · #Charge (physics) #Charge conservation #Condensed matter physics #Cosmology and Gravitation Theories #Heavy ion #High-Energy Particle Collisions Research #Ion #Limit (mathematics) #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Relaxation (psychology) #Statistical physics #Thermodynamic limit #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.98.014903
published as Phys. Rev. C 98, 014903 (2018) · 20 pages, 1 figure
arxiv created 2018/02/14 · openalex created_date 2018/02/23 · openalex publication_date 2018/07/06 · arxiv updated 2018/07/11 · openalex updated_date 2026/08/05
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 \ensuremathμ5 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 \ensuremathμ5 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.