One-loop regularization of supergravity: The dilaton and the superfield formulation - art. no. 084028

The on-shell regularization of the one-loop divergences of supergravity the ories is generalized to include a dilaton of the type occurring in effectiv e field theories derived from superstring theory, and the superfield struct ure of the one-loop corrections is given. Field theory anomalies and quantu m contributions to soft supersymmetry breaking are discussed. The latter ar e sensitive to the precise choice of couplings that generate Pauli-Villars masses, which in turn reflect the details of the underlying theory above th e scale of the effective cutoff. With a view to the implementation the Gree n-Schwarz and other mechanisms for canceling field theory anomalies under a U(1) gauge transformation and under the T-duality group of modular transfo rmations, we show that the Kahler potential renormalization for the untwist ed sector of orbifold compactification can be made invariant under these gr oups.