We construct all possible complete metrics of cohomogeneity one G2 holonomy with S × S principal orbits from gauged supergravity. Our approach rests on a generalization of the twisting procedure used in this framework. It corresponds to a non-trivial embedding of the special Lagrangian three–cycle wrapped by the D6–branes in the lower dimensional supergravity. There are constraints that neatly ...

Conformal supergravity arises in presently known formulations of twistor-string theory either via closed strings or via gauge-singlet open strings. We explore this sector of twistor-string theory, relating the relevant string modes to the particles and fields of conformal supergravity. We use the twistor-string theory to compute some tree level scattering amplitudes with supergravitons. Since t...

In this paper we study K3 compactification of ten-dimensional massive type IIA theory with all possible Ramond-Ramond background fluxes turned on. The resulting six-dimensional theory is a new massive (gauged) supergravity with an action that is manifestly invariant under an O(4, 20)/O(4) × O(20) duality symmetry. We discover that this six-dimensional theory interpolates between vacua of ten-di...

We present a simple derivation of the ‘Dirac’ equation for the supermembrane fermionic field in a D=11 supergravity background with fluxes by using a complete but gauge–fixed description of the supergravity–supermembrane interacting system previously developed. We also discuss the contributions linear in the supermembrane fermions –the Goldstone fields for the local supersymmetry spontaneously ...

As a continuation of our previous work on the multi-body forces of D-particles in supergravity and Matrix theory, we investigate the problem of motion. We show that the scattering of D-particles including recoil derived in Matrix theory is precisely reproduced by supergravity with the discrete light-cone prescription up to the second order in 11 dimensional Newton constant. An intimate connecti...