Complex geometry of conifolds and 5-brane wrapped on 2-sphere

TL;DR

This paper explores complex geometric structures of conifolds and wrapped 5-branes in type II supergravity, constructing explicit forms and demonstrating their supersymmetry preservation, unifying various solutions under a universal framework.

Contribution

It provides explicit constructions of complex, Kähler, and (3,0) forms for conifold and 5-brane solutions, and unifies different supergravity solutions via a single ansatz and superpotential approach.

Findings

Explicit complex structures and forms for conifolds and 5-branes.

Demonstration of supersymmetry preservation in these solutions.

Unified description of various brane solutions through a universal ansatz.

Abstract

We investigate solutions of type II supergravity which have the product R^4 x M^6 structure with non-compact M^6 factor and which preserve at least four supersymmetries. In particular, we consider various conifolds and the N=1 supersymmetric NS5-brane wrapped on 2-sphere solution recently discussed in hep-th/0008001. In all of these cases, we explicitly construct the complex structures, and the Kaehler and parallel (3,0) forms of the corresponding M^6. In addition, we verify that the above solutions preserve, respectively, eight and four supersymmetries of type II theory. We also demonstrate that the ordinary and fractional D3-brane solutions on singular, resolved and deformed conifolds, and the (S-dual of) NS5-brane wrapped on 2-sphere can be obtained as special cases from a universal ansatz for the supergravity fields and a single 1-d action governing their radial evolution. We show that like the 3-branes on conifolds, the NS5-brane on 2-sphere background can be found as a solution of first order system following from a superpotential.