Let's have SU(3) irreducible representations 3,ˉ3. How to get result that 3⊗3=6⊕ˉ3 ?
I'm interested in ˉ3 part. It's clear that for 3⊗3 we can use tensor rules by expanding corresponding matrix on symmetric 6 and antisymmetric parts. But why we have ˉ3, not 3, for antisymmetric part?
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