Topological heterotic rings
Topological heterotic rings
We prove the existence of topological rings in (0,2) theories containing non-anomalous left-moving U (1) currents by which they may be twisted.While the twisted models are not topological, their ground operators form a ring under non-singular OPE which reduces to the (a,c) or (c,c) ring at (2,2) points and to …