Study of the Reactionν+n→μ−+p

Abstract

166 events of the reaction $\nu +n\to {\mu }^{-}+p$ at an average neutrino energy of ∼ 0.7 GeV have been observed in the Argonne National Laboratory 12-ft deuterium bubble chamber. The results are well described by the conventional current-current weak-interaction theory with three real form factors ${F_V}^1$, ${F_V}^2$, and $F_A$. Using electron-nucleon scattering results to fix the vector mass $M_V$ at 0.84 GeV, and assuming a dipole form for $F_A$, we obtain the value 0.95 ± 0.12 GeV for the axial-vector mass $M_A$.