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Maximally Supersymmetric String Theories in D<10

Shyamoli Chaudhuri·G. Hockney·Joseph D. Lykken
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Abstract

The existence of maximally supersymmetric solutions to heterotic string theory that are not toroidal compactifications of the ten-dimensional superstring is established. We construct an exact fermionic realization of an N=1 supersymmetric string theory in D=8 with non-simply-laced gauge group Sp(20). Toroidal compactification to six and four dimensions gives maximally extended supersymmetric theories with reduced rank (4,12) and (6,14) respectively.

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Shyamoli Chaudhuri, G. Hockney, Joseph D. Lykken. 1995-05-10. Maximally Supersymmetric String Theories in D<10. https://doi.org/10.1103/physrevlett.75.2264

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