Measurement of electroweak parameters from νμ-e-scattering

A determination of the electroweak parameters performed by the CHARM II experiment from the study of neutrino-electron elastic cross-section is reported. Analyzed data refer to detector exposure to the CERN wide band neutrino beam in the years from 1987 to 1990. The observation of about 2100 νe- and 2200 ν-bare- scattering events, together with a precise measurement of the neutrino fluxes, is suitable to measure the effective vector and axial-vector coupling constants of the electron to the weak neutral current. (author) 11 refs.; 4 figs.; 2 tabs