Warped QCD without the Strong CP Problem
High Energy Physics - Phenomenology
2009-11-10 v2
Abstract
QCD in a five-dimensional sliced AdS 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. Breaking suppression and enhancement due to AdS warping are considered in addition to naive boundary separation effects.
Cite
@article{arxiv.hep-ph/0301273,
title = {Warped QCD without the Strong CP Problem},
author = {A. Fukunaga and K. -I. Izawa},
journal= {arXiv preprint arXiv:hep-ph/0301273},
year = {2009}
}
Comments
10 pages, latex