Effect of Rescattering on Forward-Backward Correlations
  We use the Ultra-relativistic Quantum Molecular Dynamic model (UrQMD v2.2) to study forward-backward fluctuations and compare our results with the data published by the PHOBOS experiment. The extracted effective cluster multiplicities show a clear centrality dependence within the present hadron-string transport approach. This behavior is not reproduced with models not taking into account final state rescattering. 
Stephane Haussler, Mohamed Abdel-Aziz and Marcus Bleicher