Two- and three-particle nonflow contributions to the chiral magnetic effect measurement by spectator and participant planes in relativistic heavy ion collisions

2021/06/29 by Y. Feng, Yicheng Feng, J. Zhao +6 · 26 citations
Physics and Astronomy · #Azimuth #Centrality #Charged particle #Heavy ion #High-Energy Particle Collisions Research #Ion #Nuclear physics #Optics #Particle (ecology) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.105.024913

published in Physical Review C 105(2) (American Institute of Physics) · 11 pages, 9 figures, 1 table

arxiv created 2021/06/29 · openalex publication_date 2022/02/28 · arxiv updated 2022/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Correlation measurements with respect to the spectator and participant planes in relativistic heavy ion collisions were proposed to extract the chiral magnetic effect (CME) from background dominated azimuthal correlators. This paper investigates the effects of two- and three-particle nonflow correlations on the extracted CME signal fraction, f_CME. It is found, guided by a multiphase transport (AMPT) model and the heavy ion jet interaction generator (HIJING) together with experimental data, that the nonflow effects amount to approximately (4±5)% and (-5±3)% without and with pseudorapidity gaps, respectively, in 20-50% centrality Au+Au collisions at √s_NN= 200 GeV.

Citations

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