hello, I am trying to follow the arguments in Peskin pages 96-97 where the exponentiation of disconnected diagrams are performed. I think the 'proof' is too 'not detailed' and was wondering if there exists a better explanation elsewhere?(adsbygoogle = window.adsbygoogle || []).push({});

My biggest question is the sentence on page 97 "The sum of the connected pieces factors out..." and what n_i is/means. I understand better if one starts with the most basic case, then do it for one more case, and then generalizes it - I think the generalization comes immediately here =/

best regards

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# Exponent of disconnected feynman diagrams

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