paper

Low-Energy Analysis of and Theories on Calabi-Yau Threefolds

arXiv:hep-th/9604097 · doi:10.1016/0550-3213(96)00268-4

Abstract

We elucidate the interplay between gauge and supersymmetry anomalies in six-dimensional supergravity with generalized couplings between tensor and vector multiplets. We derive the structure of the five-dimensional supergravity resulting from the reduction of these models and give the constraints on Chern-Simons couplings that follow from duality to theory compactified on a Calabi-Yau threefold. The duality is supported only on a restricted class of Calabi-Yau threefolds and requires a special type of intersection form. We derive five-dimensional central-charge formulas and discuss briefly the associated phase transitions. Finally, we exhibit connections with -theory compactifications on Calabi-Yau manifolds that admit elliptic fibrations. This analysis suggests that theory unifies Type- three-branes and -theory five-branes.

27 pages, LaTex. final version, to appear in Nucl. Phys. B

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