A. Zee, Quantum Field Theory in a Nutshell · Problem N.3.4

Field Theory Redux

Physics — QFT

Problem

Worry about the sloppy handling of factors of 2 in appendix 1. [Hint: The final result is correct because the polarization vectors in (5-6) are normalized to ∣ϵ∣2=2|\epsilon|^2 = 2 for convenience.]

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