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Are magnetic monopoles hadrons?

Michael Creutz
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Abstract

The charges of magnetic monopoles are constrained to a multiple of $2π$ times the inverse of the elementary unit electric charge. In the standard model, quarks have fractional charge, raising the question of whether the basic magnetic monople unit is a multiple of $2 π/e$ or three times that. A simple lattice construction shows how a magnetic monopole of the lower strength is possible if it interacts with gluonic fields as well. Such a monopole is thus a hadron. This is consistent with the construction of magnetic monopoles in grand unified theories.

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Michael Creutz. 2004-08-09. Are magnetic monopoles hadrons?. https://doi.org/10.1016/j.nuclphysbps.2004.11.198

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