Counterterms in self-energy diagram

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1. Dec 12, 2015

PineApple2

2. Dec 13, 2015

Avodyne

Think of $p^2$ as $\rlap{\,/}p^2$. Then differentiate with respect to $\rlap{\,/}p$.

3. Dec 13, 2015

PineApple2

Sure. I was not concentrated last night. Thanks!