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questions
3
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What is the physical meaning of Lie congruence classes?
Any weight $\lambda$ characterising a representation of $\mathfrak{su}(N)$ is an element of one of the $N$ congruence classes defined by (ref.1)
$$
\lambda_1+2\lambda_2+\cdots+(N-1)\lambda_{N-1}\quad\...
2
votes
1
answer
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What is the effect of the Gell-Mann matrices on color antiparticles?
I'm studying QCD and I can't understand how exactly are defined the color antiparticles. Indeed, we have the particle color triplet $(r,g,b)$. With the usual SU(3) algebra, we define the 8 Gell-Mann ...
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