More dual fluxes and moduli fixing

GERARDO ALDAZABAL, ANAMARIA FONT; P. CAMARA; A. FONT; L.IBANEZ

JOURNAL OF HIGH ENERGY PHYSICS

SPRINGER

Año: 2006

1126-6708

We generalize the recent proposal that invariance under T-duality leads to additional nongeometric fluxes required so that superpotentials in type IIA and type IIB orientifolds match. We show that invariance under type IIB S-duality requires the introduction of a new set of fluxes leading to further superpotential terms. We find new classes of N =1 supersymmetric Minkowski vacua based on type IIB toroidal orientifolds in which not only dilaton and complex moduli but also K¨ahler moduli are fixed. The chains of dualities relating type II orientifolds to heterotic and M-theory compactifications suggests the existence of yet further flux degrees of freedom. Restricting to a particular type IIA/IIB or heterotic compactification only some of these degrees of freedom have a simple perturbative and/or geometric interpretation.