On the Duality between Perturbative Heterotic Orbifolds and M-Theory on T^4/Z_N

V. Kaplunovsky, J. Sonnenschein, S. Theisen +1

The heterotic $E_8\times E_8$ string compactified on an orbifold $T^4/\IZ_N$ has gauge group $G\times G^{\prime }$ with (massless) states in its twisted sectors which are charged under both…