  Charge balance functions provide insight into critical issues concerning
hadronization and transport in heavy-ion collisions by statistically isolating
charge/anti-charge pairs which are correlated by charge conservation. However,
distortions from residual interactions and unbalanced charges cloud the
observable. Within the context of simple models, the significance of these
effects is studied by constructing balance functions in both relative rapidity
and invariant relative momentum. Methods are presented for eliminating or
accounting for these distortions.
