SESZIONE DI TORINO
The analysis of the vector and axial form factors in the Rein-Sehgal (RS) model will be presented. The Rein-Sehgal (RS) model (usually used in Monte Carlo simulations) describes single pion production in neutrino-nucleon scattering. I will present some phenomenological and theoretical arguments which lead to new form of the vector and axial form factors. The vector part is shown to agree with the resonant contribution to electron-proton inclusive F2 data. The axial part is obtained by finding a simultaneous fit to ANL and BNL d\sigma/dQ2 neutrino scattering data. Our best fit corresponds to C5A(0)=0.88 in the Rarita Schwinger formalism. Nonzero lepton mass effects in the Rein-Sehgal model will be also discussed.

DATA: 20-02-2008