Moduli Space of CHL Strings

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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Minor typos corrected; 13 pages, LaTeX

Scientific paper

10.1103/PhysRevD.52.7168

We discuss an orbifold of the toroidally compactified heterotic string which gives a global reduction of the dimension of the moduli space while preserving the supersymmetry. This construction yields the moduli space of the first of a series of reduced rank theories with maximal supersymmetry discovered recently by Chaudhuri, Hockney, and Lykken. Such moduli spaces contain non-simply-laced enhanced symmetry points in any spacetime dimension D<10. Precisely in D=4 the set of allowed gauge groups is invariant under electric-magnetic duality, providing further evidence for S-duality of the D=4 heterotic string.

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