Self-duality beyond chiral p-form actions

The self-duality of chiral p-forms was originally investigated by Pasti, Sorokin and Tonin in a manifestly Lorentz covariant action with non-polynomial auxiliary fields. The investigation was then extended to other chiral p-form actions. In this paper we point out that the self-duality appears in a wider context of theoretical models that relate to chiral p-forms. We demonstrate this by considering the interacting model of Floreanini–Jackiw chiral bosons and gauge fields, the generalized chiral Schwinger model (GCSM) and the latterʹs gauge invariant formulation, and discover that the self-duality of the GCSM corresponds to the vector and axial vector current duality.