Supersymmetry and String Theory

  • #1

Golfer

18
0
I am reading Michael Hines new book, Supersymmetry and String Theory. He keeps referring to "tree-level". What is this?
 
  • #2
"Tree-level" refers to Feynman diagrams with no loops. That is, 0th order in perturbation theory (h-bar).
 

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