Supersymmetry of consistent massive truncations of type-IIB supergravity

Abstract

We discuss the supersymmetry and fermionic sector of the recently obtained consistent truncations of IIB supergravity containing massive modes. In particular, we present the general form of the five-dimensional $\mathcal{N}=4$ supersymmetry transformations and equations of motion for the fermions arising in the reduction of IIB theory on ${T}^{1,1}$ which contains all modes invariant under the $\mathrm{SU}(2)\ifmmode\times\else\texttimes\fi{}\mathrm{SU}(2)$ isometry group. The $\mathcal{N}=4$ reduction can be further truncated to two different $\mathcal{N}=2$ subsectors. For each of these, we present the $\mathcal{N}=2$ fermionic supersymmetry transformations and corresponding superpotentials. As an application, we obtain the explicit Killing spinors of the Klebanov-Strassler solution and comment on the relation to the ansatz of Papadopoulos and Tseytlin. We also demonstrate the applicability of consistent truncations on squashed Sasaki-Einstein manifolds to a class of flux compactifications, focusing on a recent solution describing the geometry of gaugino condensation on wrapped D7 branes and which possesses dynamic SU(2) structure.