Centrality dependence of forward-backward multiplicity correlation in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV

TL;DR

This study investigates how the forward-backward multiplicity correlation in gold-gold collisions at 200 GeV varies with collision centrality, using a parton-hadron cascade model to compare with experimental STAR data.

Contribution

It demonstrates that the PACIAE model can reproduce key features of the correlation dependence on centrality observed in experiments, highlighting model strengths and limitations.

Findings

Model reproduces flat pseudorapidity dependence in central collisions.

Model shows decreasing correlation strength with decreasing centrality.

Theoretical results are larger than STAR data for peripheral collisions.

Abstract

We have studied the centrality dependence of charged particle forward-backward multiplicity correlation strength in Au+Au collisions at $\sqrt{s_{NN}}$=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 characters: (1) the approximately flat pseudorapidity dependence in central collisions and (2) the monotonous decrease with decreasing centrality are well reproduced. However the theoretical results are bigger than the STAR data for the peripheral collisions. A discussion is given for the comparison among the different models and STAR data.