On-Mass-Shell Gaugino Condensation in Z_{N} Orbifold Compactifications

TL;DR

This paper investigates non-perturbative effects in string-derived supergravity models, focusing on gaugino condensation in Z_{N} orbifolds, highlighting duality invariance and symmetry preservation.

Contribution

It introduces a duality-invariant scalar potential approach to analyze gaugino condensation in Z_{N} orbifold compactifications, independent of dilaton superfield representation.

Findings

Duality invariance of the scalar potential is established.

The approach preserves the U(1)_{PQ} symmetry exactly.

Gaugino condensation is studied in a duality-symmetric framework.

Abstract

We discuss non-perturbative aspects of string effective field theories with N=1 supersymmetry in four dimensions. By the use of a scalar potential, which is on-shell invariant under the supersymmetric duality of the dilaton, we study gaugino condensation in (2,2) symmetric Z_{N} orbifold compactifications. The duality under consideration relates a two-form antisymmetric tensor to a pseudoscalar. We show, that our approach is independent of the superfield-representation of the dilaton and preserves the U(1)_{PQ} Peccei-Quinn symmetry exactly.