Script N = 1 effective potential from dual type-IIA D6/O6 orientifolds with general fluxes

We consider N=1 compactifications of the type-IIA theory on the T6/(Z2xZ2)orbifold and O6 orientifold, in the presence of D6-branes and general NSNS, RRand Scherk-Schwarz geometrical fluxes. Introducing a suitable dual formulationof the theory, we derive and solve the Bianchi identities, and show how certaincombinations of fluxes can relax the constraints on D6-brane configurationscoming from the cancellation of RR tadpoles. We then compute, via generalizeddimensional reduction, the N=1, D=4 effective potential for the seven mainmoduli, and comment on the relation with truncated N=4 gaugings. As abyproduct, we obtain a general geometrical expression for the superpotential.We finally identify a family of fluxes, compatible with all Bianchi identities,that perturbatively stabilize all seven moduli in supersymmetric AdS4.Comment: 19 pages, no figures, JHEP3 LaTeX. Published versio