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Weak force vertex factor V - A

  1. Oct 25, 2011 #1
    Hi forum,

    The weak force vertex factor is γu(1-γ5). Am I right that
    the axial component only couples to left handed fermions? Does the vector component
    couple to both left and right-handed fermions?

    Thanks, Mark
  2. jcsd
  3. Oct 25, 2011 #2
    It's the combination of the two that only couples to left-handed fermions. On their own, the V coupling gives you something like R+L and the A coupling gives R-L, so V-A cancels the couplings to R and only leaves couplings to L.
  4. Oct 25, 2011 #3
    Thanks very much Parlyne, that was a very helpful answer.
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