A supersymmetric chiral gauge theory stabilized by anomaly-mediated supersymmetry breaking produces a composite QCD axion whose Peccei-Quinn symmetry is protected by a discrete gauge symmetry.
(A.15) The axion decay constant is then calculated to be fa = fP Q N ≈ 0.17 Λ14 Λ14 m 3/28 , (A.16) where the color anomaly coefficient is N = 168 in this theory
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A High-Quality Axion from Exact SUSY Chiral Dynamics
A supersymmetric chiral gauge theory stabilized by anomaly-mediated supersymmetry breaking produces a composite QCD axion whose Peccei-Quinn symmetry is protected by a discrete gauge symmetry.