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M Theory, Orientifolds and G-Flux

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arxiv hep-th/9908088 v3 pith:PUGVXGMI submitted 1999-08-12 hep-th

M Theory, Orientifolds and G-Flux

classification hep-th
keywords orientifoldbackgroundfluxescompactificationstheoryvacuaanomalycalabi-yau
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

We study the properties of M and F theory compactifications to three and four dimensions with background fluxes. We provide a simple construction of supersymmetric vacua, including some with orientifold descriptions. These vacua, which have warp factors, typically have fewer moduli than conventional Calabi-Yau compactifications. The mechanism for anomaly cancellation in the orientifold models involves background RR and NS fluxes. We consider in detail an orientifold of $K3\times T^2$ with background fluxes. After a combination of T and S-dualities, this type IIB orientifold is mapped to a compactification of the SO(32) heterotic string on a non-Kahler space with torsion.

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