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Answer by Richard Myers for Adjoint representation and spinor field valued in...
Perhaps this will help. Let $t^a$ be the generators of the Lie algebra is some representation. For example, this could be the adjoint representation as you're asking about and each $t^a$ will be a...
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I'm following the lecture notes by Timo Weigand on QFT.On page 169, section 6.2 he is briefly touching on the non-abelian gauge symmetry in the SM.The fundamental representation makes sense to me. For...
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