Balance Functions of charged hadron pairs (π,K,p)×(π,K,p) in Au+Au collisions at √sNN = 200 GeV.

1. A “Balance function” is formed from multiplicity–weighted two–particle correlation functions. It indicates, as a conditional probability of a species pair, the kinematic distribution of balancing electrical charges. The integrals of these distributions represent the relative probabilities that each species pair was locally produced together in a charge-conserving process during the collision. We have formed the balance functions of the full 3×3 matrix of (π, K, p)x(π,K, p) species for several event generators from various models of the 200 GeV/nucleon Au+Au collision for the STAR experiment at RHIC. The integrals are obtained both by direct integration of the balance functions and from a simpler calculation using the multiplicity distribution of event ensembles, assuming the events to be boost invariant. The approach and results of the model prediction will be presented here.