Some properties of the anomaly-free O(32) superstring theory recently discovered by Green and Schwarz are discussed. With proper choice of ground state, the theory leads in four dimensions to an SU(5) theory with any desired number of standard generations (and no exotic or mirror fermions). It predicts axions and stable Nielsen-Olesen vortex lines. It can be consistently compactified only if certain topological conditions are imposed.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics