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Supersymmetry and String Theory

  1. Jun 11, 2008 #1
    I am reading Michael Hines new book, Supersymmetry and String Theory. He keeps referring to "tree-level". What is this?
  2. jcsd
  3. Jun 16, 2008 #2


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    "Tree-level" refers to Feynman diagrams with no loops. That is, 0th order in perturbation theory (h-bar).
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