Higher-Dimensional QCD without the Strong CP Problem

Details Higher-Dimensional QCD without the Strong CP Problem Higher-Dimensional QCD without the Strong CP Problem

2002-02-18

arxiv.org/abs/hep-ph/0202171v2

Phys.Lett. B534 (2002) 93-96

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, latex

Scientific paper

10.1016/S0370-2693(02)01663-5

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.

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