Systematics of IIB spinorial geometry
Abstract
We reduce the classification of all supersymmetric backgrounds of IIB supergravity to the evaluation of the Killing spinor equations and their integrability conditions, which contain the field equations, on five types of spinors. This extends the work of Gran et al (2005 Class. Quantum Grav. 22 118 (Preprint hepth/0503046)) to IIB supergravity. We give the expressions of the Killing spinor equations on all five types of spinors. In this way, the Killing spinor equations become a linear system for the fluxes, geometry and spacetime derivatives of the functions that determine the Killing spinors. This system can be solved to express the fluxes in terms of the geometry and determine the conditions on the geometry of any supersymmetric background. Similarly, the integrability conditions of the Killing spinor equations are turned into a linear system. This can be used to determine the field equations that are implied by the Killing spinor equations for any supersymmetric background. We show that these linear systems simplify for generic backgrounds with maximal and halfmaximal number of Hinvariant Killing spinors, H ⊂ Spin(9, 1). In the maximal case, the Killing spinor equations factorize, whereas in the halfmaximal case they do not. As an example, we solve the Killing spinor equations of backgrounds with two SU(4)\ltimes {\bb R}^8 invariant Killing spinors. We also solve the linear systems associated with the integrability conditions of maximally supersymmetric Spin(7)\ltimes{\bb R}^8 —and SU(4)\ltimes{\bb R}^8 —backgrounds and determine the field equations that are not implied by the Killing spinor equations.
 Publication:

Classical and Quantum Gravity
 Pub Date:
 March 2006
 DOI:
 10.1088/02649381/23/5/012
 arXiv:
 arXiv:hepth/0507087
 Bibcode:
 2006CQGra..23.1617G
 Keywords:

 High Energy Physics  Theory
 EPrint:
 67 pages