Symmetric correlations as seen at RHIC

Understand

We analyze the forward-backward multiplicity correlation coefficient as measured by STAR.

• We show that in the most central Au+Au collisions bins located symmetrically around \eta = 0 with large separation in pseudorapidity are more strongly correlated than bins located asymmetrically with smaller separation.
• In proton-proton collisions the opposite effect is observed.
• It suggests a qualitatively different behavior of the two-particle correlation as a function of pseudorapidity sum in p+p and Au+Au collisions.