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Standard model + symmetry questions
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[QUOTE="vanhees71, post: 4543006, member: 260864"] Ad 1) Think again about the SU(2) x U(1) in the weak sector. Is this (!) U(1) really the em. U(1)? Ad 2) What's the point about non-Abelian gauge invariance compared to an Abelian one? Think about the interactions of the non-Abelian gauge bosons in contrast to that of Abelian ones! Ad 3) How does the color gauge group act on the quark fields? It's pretty "fundamental" ;-)). [/QUOTE]
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