Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Kähllén-Lehmann formula and MS scheme

  1. Sep 18, 2012 #1
    Hi everybody!
    Using "physical normalization conditions" I find for the electron self energy
    [tex]
    Z_2^{-1}=1-\frac{d\Sigma}{dp}(p=m)
    [/tex]
    where [itex]m[/itex] is the physical mass of the electron. Then [itex]Z_2[/itex] is the same constant appearing in the Kähllén-Lehmann representation (it is the residue at the pole of the physical propagator).
    However, if I compute [itex]Z_2[/itex] in MS scheme, can I say that the [itex]Z[/itex] I found is not the same [itex]Z[/itex] in Kähllén-Lehmann?
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Similar Discussions: Kähllén-Lehmann formula and MS scheme
Loading...