Single neutral pion production by charged-current ${\bar{\nu }}_{\mu }$ interactions on hydrocarbon at $⟨E_{\nu }⟩=$ 3.6 GeV

Abstract

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.

6 pages, 5 figures, submitted to Physics Letters B

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