Special geometry for arbitrary signatures

Details Special geometry for arbitrary signatures Special geometry for arbitrary signatures

2006-12-19

arxiv.org/abs/hep-th/0612210v2

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 83 pages; v2: typos corrected, version to be published in Handbook of pseudo-Riemannian Geometry and Supersymmetry, IRM

Scientific paper

In this paper we generalize special geometry to arbitrary signatures in target space. We formulate the definitions in a precise mathematical setting and give a translation to the coordinate formalism used in physics. For the projective case, we first discuss in detail projective Kaehler manifolds, appearing in N=1 supergravity. We develop a new point of view based on the intrinsic construction of the line bundle. The topological properties are then derived and the Levi-Civita connection in the projective manifold is obtained as a particular projection of a Levi-Civita connection in a `mother' manifold with one extra complex dimension. The origin of this approach is in the superconformal formalism of physics, which is also explained in detail. Finally, we specialize these results to projective special Kaehler manifolds and provide explicit examples with different choices of signature.

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