Warped QCD without the Strong CP Problem

Details Warped QCD without the Strong CP Problem Warped QCD without the Strong CP Problem

2003-01-31

arxiv.org/abs/hep-ph/0301273v2

Phys.Lett. B562 (2003) 251-256

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, latex

Scientific paper

10.1016/S0370-2693(03)00584-7

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.

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