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What distinguishes different gluons?

  1. Jul 7, 2008 #1
    What distinguishes different gluons? All 8 have spin 1 and zero mass so what properties make a gluon different from any other?
  2. jcsd
  3. Jul 7, 2008 #2
    Re: gluons

    Their color charge : they carry different combinations of color. This is not gauge invariant, so their is no way to physically distinguish between them. Yet the number 8 is gauge invariant and physical, as paradoxical as it may seem :smile:
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