Axial currents in electro-weak pion production at threshold and in the   Delta-region
  We discuss electro-magnetic and weak production of pions on nucleons and show how results of experiments and their interpretation in terms of chiral quark models with explicit meson degrees of freedom combine to reveal the ground-state axial form factors and axial N-Delta transition amplitudes. 
S. Sirca, L. Amoreira, M. Fiolhais, B. Golli