paper

Type II Theories Compactified on Calabi-Yau Threefolds in the Presence of Background Fluxes

arXiv:hep-th/0202168 · doi:10.1016/S0550-3213(02)00338-3

Abstract

Compactifications of type II theories on Calabi-Yau threefolds including electric and magnetic background fluxes are discussed. We derive the bosonic part of the four-dimensional low energy effective action and show that it is a non-canonical N=2 supergravity which includes a massive two-form. The symplectic invariance of the theory is maintained as long as the flux parameters transform as a symplectic vector and a massive two-form which couples to both electric and magnetic field strengths is present. The mirror symmetry between type IIA and type IIB compactified on mirror manifolds is shown to hold for R-R fluxes at the level of the effective action. We also compactify type IIA in the presence of NS three-form flux but the mirror symmetry in this case remains unclear.

36 pages, Latex, version to appear in Nucl. Phys. B

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