On Sibling and Exceptional W Strings

Abstract

We discuss the physical spectrum for W strings based on the algebras B n , D n , E 6 , E 7 and E 8. For a simply-laced W string, we find a connection with the (h, h + 1) unitary Virasoro minimal model, where h is the dual Coxeter number of the underlying Lie algebra. For the W string based on B n , we find a connection with the (2h, 2h + 2) unitary N = 1… (More)