Quasielastic Neutrino Scattering

Abstract

Quasielastic scattering of neutrinos, $\ensuremath{\nu}+n\ensuremath{\rightarrow}{p}^{+}+{\ensuremath{\mu}}^{\ensuremath{-}}$, was measured in a 30-ton spark-chamber detector. Analysis of the cross section versus momentum transfer yields a value of ${M}_{{A}_{1}}=0.7\ifmmode\pm\else\textpm\fi{}0.15$ for a single-pole-type axial-vector form factor or ${M}_{{A}_{2}}=1.05\ifmmode\pm\else\textpm\fi{}0.2$ for a double-pole form factor. No decrease in cross section at low momentum transfer expected due to nuclear effects was observed.