  The balance function, which measures the correlation between opposite sign
charge pairs, is sensitive to the mechanisms of charge formation and the
subsequent relative diffusion of the balancing charges. The study of the
balance function can provide information about charge creation time as well as
the subsequent collective behavior of particles. In this paper, we present a
reaction-plane-dependent balance function study for Au+Au collisions at
$\sqrt{s_{\rm NN}}$ = 200 GeV and compare with results from recent three
particle correlation measurements. We also report balance functions for
relative pseudorapidity ($\Delta \eta$), relative rapidity ($\Delta y$), and
relative azimuthal angle ($\Delta \phi$) from the recent RHIC beam energy scan
data.
