Centrality Dependence of Two-Particle Correlations in Heavy Ion Collisions

Understand

Data from the PHOBOS detector have been used to study two-particle correlations over a broad range of pseudorapidity.

• A simple cluster model parameterization has been applied to inclusive two-particle correlations over a range of centrality for both Cu+Cu and Au+Au collisions at sqrt(s_NN)=200GeV.
• Analysis of the data for Au+Au has recently been extended to more peripheral collisions showing that the previously-observed rise in cluster size with decreasing system size eventually reaches a maximum value.
• Model studies have been used to quantify the significant effect of limited detector acceptance on the extracted cluster parameters.