Higher-Dimensional QCD without the Strong CP Problem
High Energy Physics - Phenomenology
2009-11-07 v2
Abstract
QCD in a five-dimensional sliced bulk with chiral extra-quarks on the boundaries is generically free from the strong CP problem. Accidental axial symmetry is naturally present except for suppressed breaking interactions, which plays a role of the Peccei-Quinn symmetry to make the strong CP phase sufficiently small.
Cite
@article{arxiv.hep-ph/0202171,
title = {Higher-Dimensional QCD without the Strong CP Problem},
author = {K. -I. Izawa and T. Watari and T. Yanagida},
journal= {arXiv preprint arXiv:hep-ph/0202171},
year = {2009}
}
Comments
7 pages, latex