Azimuthal Correlations of High-Transverse-Momentum π 0 Pairs

We have studied correlations between two ${\ensuremath{\pi}}^{0}'\mathrm{s}$ produced at the CERN intersecting storage rings, utilizing detectors with large azimuthal acceptance. We find that the previously observed enhancement of two ${\ensuremath{\pi}}^{0}'\mathrm{s}$ produced at azimuthal difference near 180\ifmmode^\circ\else\textdegree\fi{} can be made to vanish when certain kinematic effects are removed. However, we observe aligned configurations above 8 GeV of transverse energy unexplained by such kinematic effects.