Study of single-pion production by weak neutral currents in low-energyνdinteractions

Results are presented on single-pion production by the weak neutral current observed in low-energy neutrino reactions in deuterium. Cross sections are given for the three exclusive neutral-current final states $\nu p{\pi }^{-}$, $\nu p{\pi }^0$, and $\nu n{\pi }^{+}$ relative to the charged-current final state ${\mu }^{-}p{\pi }^{+}$. The results agree well with models for weak one-pion production which incorporate the Weinberg-Salam structure of the neutral current.