The Symplectic Structure of N = 2 Supergravity and its Central Extension ∗
نویسنده
چکیده
We report on the formulation of N = 2 D = 4 supergravity coupled to nV abelian vector multiplets in presence of electric and magnetic charges. General formulae for the (moduli dependent) electric and magnetic charges for the nV + 1 gauge fields are given which reflect the symplectic structure of the underlying special geometry. The specification to Type IIB strings compactified on Calabi-Yau manifolds, with gauge group U(1)21 is given. Contribution to the Proceedings of the Trieste Conference on “S Duality and Mirror Symmetry” June 1995 ∗ Supported in part by DOE grant DE-FGO3-91ER40662, Task C., by EEC Science Program SC1*CT92-0789 and INFN.
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