Casimir operators of QCD

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Hi folks,

I was wondering if the two Casimir operators of the SU(3) color gauge group were of any physical significance, or corresponded to any familiar physical properties. For example, I know that in the Poincare group the two Casimirs correspond to mass and spin: is there a similarly natural interpretation of the Casimirs here too? (I have only done a little bit of QCD in my studies and they haven't cropped up so far, but maybe they're useful for *something*...) Any thoughts on this matter much appreciated!
 

Bill_K

Science Advisor
Insights Author
4,155
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No need for them - everything is colorless. Except for the octet of gluons.
 

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