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arXiv · hep-th/0610331

N=31, D=11

U. Gran·J. Gutowski·G. Papadopoulos·D. Roest
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Abstract

We show that eleven-dimensional supergravity backgrounds with thirty one supersymmetries, N=31, admit an additional Killing spinor and so they are locally isometric to maximally supersymmetric ones. This rules out the existence of simply connected eleven-dimensional supergravity preons. We also show that N=15 solutions of type I supergravities are locally isometric to Minkowski spacetime.

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U. Gran, J. Gutowski, G. Papadopoulos, D. Roest. 2006-10-31. N=31, D=11. https://doi.org/10.1088/1126-6708%2F2007%2F02%2F043

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