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Centrality dependence of forward-backward multiplicity correlation in Au + Au collisions at s NN = 200 </mml:math…

2010; American Institute of Physics; Volume: 81; Issue: 4 Linguagem: Inglês

10.1103/physrevc.81.044914

1538-4497

Yu-Liang Yan, Dai-Mei Zhou, Bao-Guo Dong, Xiaomei Li, Hai-Liang Ma, Ben-Hao Sa,

Quantum Chromodynamics and Particle Interactions

We have studied the centrality dependence of charged-particle forward-backward multiplicity correlation strength in Au$+$Au collisions at $\sqrt{{s}_{\mathit{NN}}}=200$ GeV with a parton and hadron cascade model, PACIAE, based on PYTHIA. The calculated results are compared with the STAR data. The experimentally observed correlation strength characteristics, ($1$) the approximately flat pseudorapidity dependence in central collisions and ($2$) the monotonous decrease with decreasing centrality, are reproduced well. However, the theoretical results are larger than the STAR data for the peripheral collisions. We compare the different models and STAR data. A prediction for the forward-backward multiplicity correlation in Pb$+$Pb collisions at $\sqrt{{s}_{\mathit{NN}}}=5500$ GeV is also given.