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What is a longitudinally-polarized boson?

  1. Aug 1, 2007 #1
    Occassionally, I come across this term: longitudinally-polarized boson. Does it mean that the boson spin is aligned with the x-axis ?
     
  2. jcsd
  3. Aug 1, 2007 #2

    Dick

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    Longitudinal polarization is a relation between spin and momentum.
     
  4. Aug 1, 2007 #3
    So, it means the spin and the momentum is aligned the same? Isn't this similar to helicity ?
     
  5. Aug 1, 2007 #4

    Dick

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    I've always thought of them as the same. Is there a technical difference?
     
  6. Aug 1, 2007 #5

    Meir Achuz

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    Longitudinally polarized means helicity equals zero.
     
  7. Aug 1, 2007 #6

    Dick

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    Thanks, Meir. I thought my memory seemed a little fuzzy on that.
     
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