Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-03-05
Phys.Rev.C79:054902,2009
Physics
Nuclear Physics
Nuclear Theory
5 pages, 4 figures
Scientific paper
10.1103/PhysRevC.79.054902
We have studied the centrality bin size dependence of charged particle forward-backward multiplicity correlation strength in 5%, 0-5%, and 0-10% most central Au+Au collisions at $\sqrt{s_NN}}$=200 GeV with a parton and hadron cascade model, PACIAE based on PYTHIA. The real (total), statistical, and NBD (Negative Binomial Distribution) correlation strengths are calculated by the real events, the mixed events, and fitting the charged particle multiplicity distribution to the NBD, respectively. It is turned out that the correlation strength increases with increasing centrality bin size monotonously. If the discrepancy between real (total) and statistical correlation strengths is identified as dynamical one, the dynamical correlation may just be a few percent of the total (real) correlation.
Dong Bao-Guo
Li Xiao-Mei
Ma Hai-Liang
Sa Ben-Hao
Yan Yu-Liang
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