Intuition for divergences in sunset diagram

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1. Dec 15, 2015

Higgsy

What is the intuition behind divergences for the sunset diagram? I know that there is quadratic divergence by why no quartic divergence or higher?

2. Dec 16, 2015

Orodruin

Staff Emeritus
You have two loops and three propagators. Counting the powers of momentum in those gives you a naive estimate of the degree of divegence.