List of Feynman diagrams

This is a list of common Feynman diagrams. His first published diagram appeared in Physical Review in 1949. Unless otherwise specified, the shown diagrams can assumed to be the leading order representation of the interaction.

Speculative or hypothetical diagrams

Name or phenomenon	Description	Diagram
Flavor-changing neutral current	Hypothetical interactions that change the flavor of a fermion without altering its electric charge, that could happen in the standard model or beyond.
Quad cancellations	One of the many cancellations to the quadratic divergence to squared mass of the Higgs boson which occurs in the MSSM.
Neutrino-less double beta decay	If neutrinos are Majorana fermions, Neutrino-less double beta decay is possible. Several experiments are searching for this.