Naturally weak CP violation
Abstract
Ab SU(5) GUT model is proposed in which the observed CP violation is due to spontaneous symmetry breakdown. The effective field theory below the GUT scale is simply the standard model. Matching conditions at the GUT scale give a non-zero contribution to overlineθ at the one-loop level. This contribution is proportional to ratios of superheavy fermion masses over the GUT scale, which can be naturally small, in the sense of't Hooft.
- Publication:
-
Physics Letters B
- Pub Date:
- March 1984
- DOI:
- 10.1016/0370-2693(84)92025-2
- Bibcode:
- 1984PhLB..136..387N