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Why is the graviton non-renormalizable?

  1. Jul 2, 2010 #1
    Okay, I've taken relativistic E&M and the first semester of quantum mech.

    Why is the graviton non-renormalizable? As I understand it, renormalization means that you can apply a "weight" to the feynman diagrams of an interaction to make it come out right (is that correct?) Why can you not do this for gravitons?
  2. jcsd
  3. Jul 2, 2010 #2
    Here are a couple of introductory papers on renormalisation:
    http://arxiv.org/abs/0812.3578" [Broken]


    http://arxiv.org/abs/hep-th/0212049" [Broken]

    Part of the renormalization procedure involves adding counterterms to the Lagrangian. The problem with the conventional approach to quantizing gravity, as I understand it, is that the number of counterterms required grows with each order of the perturbation expansion.
    Last edited by a moderator: May 4, 2017
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