Abstract
A systematic application of the collective coordinate method to quantization of spontaneously broken gauge theories with fermions, such as GUTs, in the monopole sector is presented. Usual and unusual charge properties of the ground state GUT monopole induced by CP violation, and in particular by the fact that θ QCD ≠ θ EM, are studied. In the presence of axions, semiclassically the ground state of GUT monopole is an actual realization of a spherical color-capacitor with the capacitance controlled by the magnitude of the Peccei-Quinn symmetry breaking scale. The “vacuum” around it is characterized by strongly enhanced (strong) CP violation and extends considerably far outside the monopole core. The effect of light fermions is studied in some detail. The possibility that even in the presence of axions (i.e. θ QCD=0) there might be a non-vanishing and, in general, order-one color electric charge on the monopole ground state is pointed out.
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