Speaker
Description
Axion can solve the strong CP problem dynamically. However, since a global symmetry is expected to be broken explicitly in quantum gravity theory, any extra Peccei-Quinn (PQ) symmetry breaking operator must be suppressed, except for nonperturbative effects of QCD. In this talk, we propose a novel paradigm for the QCD axion with high-quality PQ symmetry on the basis of electric-magnetic duality in the conformal window of a supersymmetric gauge theory. PQ breaking fields emerge in the magnetic theory and possess a large anomalous dimension, which leads to not only generation of an intermediate scale of spontaneous PQ breaking but also significant suppression of explicit PQ symmetry breaking operators. The high PQ quality and the absence of a Landau pole in the color gauge coupling are achieved. We will also show the parameter space to realize the correct abundance of the axion dark matter.
