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Intuition for divergences in sunset diagram

  1. Dec 15, 2015 #1
    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. jcsd
  3. Dec 16, 2015 #2


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