The weak $N-\Delta$ axial-vector transition amplitude $ $ - important in $N^{*}$ production processes in general and in isobar models describing $\nu_\mu N\to \mu \Delta$ processes in particular - is examined using a broken symmetry algebraic approach to QCD which involves the realization of chiral current algebras. We calculate a value for the form factor $C_{5}^{A}(0)$ in good agreement with experiment.

We calculate the axial N → A(1232) and N → N*(1440) transition form factors in a chiral constituent quark model. As required by the partial conservation of axial current (PCAC) condition, we include… Expand

The purpose and outline of this book particles and interactions - a review currents, charges and commutators - a review asymoptotic behaviour of broken flavour symmetry on the foundation of… Expand