  Measurements of the production of high energy pi0 mesons at large
pseudorapidity, coincident with charged hadrons at mid-rapidity, for
proton+proton and deuteron+gold collisions at sqrt(s)_NN=200 GeV are reported.
The p+p cross section for inclusive pi0 production follows expectations from
next-to-leading order perturbative QCD. Both the inclusive cross section and
the di-hadron azimuthal correlations are consistent with a model where parton
showers supplement leading-order pQCD. A suppression of the back-to-back
azimuthal correlations was observed in d+Au, qualitatively consistent with the
gluon saturation picture.
