i've worked in a physics lab and can confirm this is true.
*click*
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Mon 6 Oct 2008, 13:03,
archived)
Oh man.
I couldn't remember much about gluons so I looked on Wikipedia to brush up. Now my brain is somewhere in my shoes.
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Mon 6 Oct 2008, 13:07,
archived)
Well of course everyone knows...
The gluon is a vector boson; like the photon, it has a spin of 1. While massive spin-1 particles have three polarization states, massless gauge bosons like the gluon have only two polarization states because gauge invariance requires the polarization to be transverse.
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Mon 6 Oct 2008, 13:12,
archived)