The N-Delta axial form factors are determined from neutrino induced pion production ANL & BNL data by using a state of the art theoretical model, which accounts both for background mechanisms and deuteron effects. We find violations of the off diagonal Goldberger-Treiman relation at the level of 2 sigma which might have an impact in background calculations for T2K and MiniBooNE low energy neutrino oscillation precision experiments.
@article{arxiv.1001.4416,
title = {N-Delta(1232) axial form factors from weak pion production},
author = {E. Hernandez and J. Nieves and M. Valverde and M. J. Vicente-Vacas},
journal= {arXiv preprint arXiv:1001.4416},
year = {2010}
}