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Polariations vectors 
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#1
Jan2812, 08:33 AM

P: 283

In QFT, for the massive vector particles we have in the rest frame the following polarization vectors.
[itex]\epsilon^{a}_{\mu}[/itex] where a = 1,2,3 with [itex]\epsilon^{1}_{\mu}[/itex] = (0,1,0,0) [itex]\epsilon^{2}_{\mu}[/itex] = (0,0,1,0) [itex]\epsilon^{3}_{\mu}[/itex] = (0,0,0,1) I do not understand the indices, a and [itex]\mu[/itex] and how the relate? What would [itex]\epsilon^{1}_{1}[/itex] be in the given rest frame? What happens when the frame is boosted? thanks 


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