Constraints on Axion Models from $K^+\to\pi^+ a$
High Energy Physics - Phenomenology
2016-08-25 v2
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 flavour 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 kill off the models.
Keywords
Cite
@article{arxiv.hep-ph/9807363,
title = {Constraints on Axion Models from $K^+\to\pi^+ a$},
author = {Mark Hindmarsh and Photis Moulatsiotis},
journal= {arXiv preprint arXiv:hep-ph/9807363},
year = {2016}
}
Comments
15pp RevTeX, 1 eps fig, uses graphics style. Expanded discussion on massive scalars and pseudoscalars, typos. To appear in Physical Review D