A twist at infinite distance in the CHL string

Abstract

Abstract We analyze a space-time algebra of BPS states that emerges in the infinite distance limit in the moduli space of the nine-dimensional CHL string as the theory decompactifies to the ten-dimensional E8 × E8 heterotic string. We find an affine algebra as expected from the heterotic case, but in a twisted version.

Keywords

• Space-Time Symmetries
• String Duality
• Superstrings and Heterotic Strings