Magnetic Mixing -- Electric Minicharges from Magnetic Monopoles

Details Magnetic Mixing -- Electric Minicharges from Magnetic Monopoles Magnetic Mixing -- Electric Minicharges from Magnetic Monopoles

2009-05-05

arxiv.org/abs/0905.0633v1

JHEP 0906:037,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 1 figure

Scientific paper

10.1088/1126-6708/2009/06/037

Many extensions of the Standard Model require the existence of a "hidden" sector. We consider settings where the hidden sector in the infrared contains a U(1) gauge factor with magnetic monopoles, for instance 't Hooft-Polyakov monopoles of an underlying non-abelian gauge group. In the presence of CP violation these monopoles acquire an electric charge in the hidden sector due to the Witten effect. We show that quite generally they also acquire (small) electric charges under the visible electromagnetic gauge group. This is a result of "magnetic mixing" which, as we show, often arises as a natural partner of kinetic mixing. Both kinetic and magnetic mixing are naturally induced radiatively even if the low-energy U(1)s arise from a single non-abelian gauge group. We argue that the hidden sector monopoles can be light and their electric minicharges could thus be testable in current and near future low-energy experiments.

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