User contributions
- 15:49, 6 April 2017 (diff | hist) . . (+698) . . N Loop-induced (Created page with "In perturbative quantum field theory, a '''loop-induced''' effect refers to any mechanism which is induced exclusively by loop diagrams. If no tree-level coupling...")
- 15:22, 6 April 2017 (diff | hist) . . (+506) . . N Tree level (Created page with "In the context of perturbation theory, a '''tree-level''' Feynman diagram is a topology contributing to the probability amplitude for a scattering process which contai...")