  The pi+ pi- balance function in rapidity is computed in a thermal model with
resonances. It is found that the correlations from the neutral-resonance decays
are important, yielding about a half of the total contribution, which in
general consist of resonance and non-resonance parts. The model yields the
pionic balance function a few per cent wider that what follows from the recent
data for the Au+Au collisions at 130GeV.
