Abstract
The quasielastic reaction was studied in an experiment using the BNL 7-foot deuterium bubble chamber exposed to the wide-band neutrino beam with an average energy of 1.6 GeV. A total of 1138 quasielastic events in the momentum-transfer range ( were selected by kinematic fitting and particle identification and were used to extract the axial-vector form factor from the distribution. In the framework of the conventional theory, we find that the dipole parametrization is favored over the monopole. The value of the axial-vector mass in the dipole parametrization is 1.07±0.06 GeV, which is in good agreement with both recent neutrino and electroproduction experiments. In addition, the standard assumptions of conserved vector current and no second-class currents are checked.
- Received 12 February 1981
DOI:https://doi.org/10.1103/PhysRevD.23.2499
©1981 American Physical Society