  The related studies of two-particle correlations and event-by-event
fluctuations have played important roles in the search for new physics through
the experimental study of relativistic heavy ion collisions. We present a
general method of determining minimum-bias two-particle correlations and show
the relationship between these correlations and event-by-event fluctuations.
Data from the STAR experiment at RHIC for Au-Au collisions at $\sqrt{s_{NN}}$ =
62 and 200 GeV will be presented that show the energy and centrality
dependences of angular correlations. This analysis provides a unique method for
studying the interaction of semi-hard scattered partons with the dense medium
produced at RHIC as well as properties of the bulk medium itself, and will shed
new light on the sources of non-statistical fluctuations.
