On non-abelian T-dual geometries with Ramond fluxes

We show how to implement T-duality along non-abelian isometrics in backgrounds with non-vanishing Ramond fields. When the dimension of the isometry group is odd (even) the duality swaps (preserves) the chirality of the theory. In certain cases a non-abelian duality can result in a massive type-HA background. We provide two examples by dualising SU(2) isometry subgroups in AdS(5) x S-5 and AdS(3) x S-3 x T-4. The resultant dual geometries inherit the original AdS factors but have transverse spaces with reduced isometry and preserve only half of the original supersymmetry. The non-abelian dual of AdS(5) x S-5 has an M-theory lift which is related to the gravity duals of N = 2 superconformal theories. We comment on a possible interpretation of this as a high spin limit. (C) 2011 Elsevier B.V. All rights reserved.