  Single neutral pion production via muon antineutrino charged-current
interactions in plastic scintillator (CH) is studied using the \minerva
detector exposed to the NuMI low-energy, wideband antineutrino beam at
Fermilab. Measurement of this process constrains models of neutral pion
production in nuclei, which is important because the neutral-current analog is
a background for $\bar{\nu}_e$ appearance oscillation experiments. The
differential cross sections for $\pi^0$ momentum and production angle, for
events with a single observed $\pi^0$ and no charged pions, are presented and
compared to model predictions. These results comprise the first measurement of
the $\pi^0$ kinematics for this process.
