Families, the invisible axion, and domain walls
Abstract
We consider models in which the unbroken discrete subgroup of a Peccei-Quinn symmetry may be effectively embedded in the rest of the continuous symmetry group to avoid the formation of domain walls. In this context we may gain insight into the family question. We note that instantons in an unbroken ``hypercolor'' group might be used to reduce the size of the discrete symmetry or to eliminate it altogether.
- Publication:
-
Physics Letters B
- Pub Date:
- October 1982
- DOI:
- 10.1016/0370-2693(82)90331-8
- Bibcode:
- 1982PhLB..116..227B