Abstract
We explore a new class of axion models in which some, but not all, of the left-handed quarks have a Peccei-Quinn symmetry. These models are potentially afflicted by flavor changing neutral currents. We derive the bounds on the Peccei-Quinn symmetry-breaking scale from bounds on the branching ratio, showing that in some cases they are even stronger than the astrophysical ones, but still not strong enough to destroy the models.
- Received 6 August 1998
DOI:https://doi.org/10.1103/PhysRevD.59.055015
©1999 American Physical Society