Non-Abelian monopoles as the origin of dark matter

We suggest that dark matter may be partially constituted by a dilute ’t Hooft–Polyakov monopoles gas. We reach this conclusion by using the Georgi–Glashow model coupled to a dual kinetic mixing term [Formula: see text] where [Formula: see text] is the electromagnetic field and [Formula: see text] the ’t Hooft tensor. We show that these monopoles carry both (Maxwell) electric and (Georgi–Glashow) magnetic charges and the electric charge quantization condition is modified in terms of a dimensionless real parameter. This parameter could be determined from milli-charged particle experiments.