A supersymmetric consistent truncation for conifold solutions

We establish a supersymmetric consistent truncation of type IIB supergravity on the T-1.1 coset space, based on extending the Papadopoulos-Tseytlin ansatz to the full set of SU(2) x SU(2) invariant Kaluza-Klein modes. The five-dimensional model is a gauged N = 4 supergravity with three vector multiplets, which incorporates various conifold solutions and is suitable for the study of their dynamics. By analysing the scalar potential we find a family of new non-supersymmetric AdS(5) extrema interpolating between a solution obtained long ago by Romans and a solution employing an Einstein metric on T-1.1 different from the standard one. Finally, we discuss some simple consistent subtruncations preserving N = 2 supersymmetry. One of them still contains the Klebanov-Strassler solution, and is compatible with the inclusion of smeared D7-branes. (C) 2010 Elsevier B.V. All rights reserved.