Dynamical relaxation of θ and supergravity

Abstract

We consider the dynamical relaxation of θ in the no-scale supergravity models with the Peccei-Quinn symmetry which is non-linearly realized on the manifold of hidden sector fields. As a non-trivial model, we present an [SU(1, 1)] supergravity model realizing the dynamical relaxation of θ and the dynamical generation of mass hierarchy MW/MPl through the hidden sector fields. © 1987.