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Parallelisable Heterotic Backgrounds

José Figueroa-O'Farrill, Teruhiko Kawano, Satoshi Yamaguchi

hep-tharXiv:hep-th/0308141

Abstract

We classify the simply-connected supersymmetric parallelisable backgrounds of heterotic supergravity. They are all given by parallelised Lie groups admitting a bi-invariant lorentzian metric. We find examples preserving 4, 8, 10, 12, 14 and 16 of the 16 supersymmetries.

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