Four-dimensional $\phi^4$ Theory at One Loop
We looked at the divergences in the one-loop diagrams in the four-dimensional $\phi^4$ theory, and how they are renormalized. This requires mass, coupling constant, and field renormalization.
I concluded with pictures of the running coupling constants in the Standard Model:
Gauge coupling constants without supersymmetry
Gauge coupling constants with supersymmetry meet in a point. Does it mean something?
Quartic Higgs coupling runs to smaller and possibly negative values at high energies.
TODO: type my lecture notes