't Hooft tensor for generic gauge group
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We study monopoles in gauge theories with generic gauge group. Magnetic charges are in one-to-one correspondence with the second homotopy classes at spatial infinity ($Π_2$), which are therefore identified by the 't Hooft tensor. We determine the 't Hooft tensor in the general case. These issues are relevant to the understanding of Color Confinement.
5 pages. Contribution to the Conference QCD08, Montpellier 7-12 July 2008 To appear in the proceedings
5 pages. Contribution to the Conference QCD08, Montpellier 7-12 July 2008 To appear in the proceedings