Unformatted text preview: Î» and m are the bare coupling constant and the bare mass correspondingly. a. (20 pts) Similar to how we did it in class for Ï† 4 theory (see also HW 4 from last quarter), rewrite the Lagrangian (1) in terms of renormalized physical Felds Ï• , coupling Î» , mass m and the counterterms. By calculating the oneloop propagator and vertex corrections Fnd the divergent ( âˆ¼ 1 /Ç« with Ç« = 6d ) parts of the coeÂ±cients of the counterterms Î´ Î» and Î´ Z . (Ignore the tadpole graph.) Note that we do not need the Fnite parts of the counterterms to Fnd Î² ( Î» )! b. (10 pts) Using the results of part a Fnd Î² ( Î» ). 1...
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 Fall '10
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 Power, Work, Quantum Field Theory, Light, homework set no., Renormalization, scattering QED diagram, counterterms Î´Î»

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