Experimental Study of Exclusive One Pion Production in All Neutrino Induced Neutral Current Channels

Abstract Results are presented on exclusive single-pion production in the bubble chamber Gargamelle, filled with a light propane-freon mixture, and exposed to the focused neutrino wide-band beam at the CERN PS. The results are corrected for nuclear reinteractions. The isospin structure of the weak neutral current is analysed using all four single-pion channels. The isovector-isoscalar interference term is measured and found to differ from zero by two standard deviations. Evidence of Δ production by the weak neutral