4.5 Article

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

Journal

PHYSICAL REVIEW C
Volume 105, Issue 2, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.105.024913

Keywords

-

Funding

  1. U.S. Department of Energy [DE-SC0012910]
  2. China Hubei Province Department of Education [D20201108]
  3. China National Natural Science Foundation [11905059, 12035006, 12075085, 12047568]
  4. China Ministry of Science and Technology [2020YFE0202001]

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This paper investigates the effects of two-and three-particle nonflow correlations on the extracted chiral magnetic effect signal fraction, and finds that the nonflow effects amount to approximately (4 +/- 5)% and (-5 +/- 3)% in 20-50% centrality Au+Au collisions.
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 root s(NN) = 200 GeV.

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