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arXiv · 1804.00319

Killing superalgebras for Lorentzian six-manifolds

Paul de Medeiros·José Figueroa-O'Farrill·Andrea Santi
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Abstract

We calculate the Spencer cohomology of the $(1,0)$ Poincar\'e superalgebras in six dimensions: with and without R-symmetry. As the cases of four and eleven dimensions taught us, we may read off from this calculation a Killing spinor equation which allows the determination of which geometries admit rigidly supersymmetric theories in this dimension. We prove that the resulting Killing spinors generate a Lie superalgebra and determine the geometries admitting the maximal number of such Killing spinors. They are divided in two branches. One branch consists of the lorentzian Lie groups with bi-invariant metrics and, as a special case, it includes the lorentzian Lie groups with a self-dual Cartan three-form which define the maximally supersymmetric backgrounds of $(1,0)$ Poincar\'e supergravity in six dimensions. The notion of Killing spinor on the other branch does not depend on the choice of a three-form but rather on a one-form valued in the R-symmetry algebra. In this case, we obtain three different (up to local isometry) maximally supersymmetric backgrounds, which are distinguished by the causal type of the one-form.

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Paul de Medeiros, José Figueroa-O'Farrill, Andrea Santi. 2018-04-01. Killing superalgebras for Lorentzian six-manifolds. https://doi.org/10.1016/j.geomphys.2018.05.019

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