CERN Accelerating science

Feynman diagrams

The NNLO frontier

by C. G. Papadopoulos (NCSR-Demokritos)

70 years ago, in September 1949, Richard Feynman introduced the so-called Feynman diagramms; a representation of various interactions between fundamental particles allowing the calculation of interaction probabilities. Where do we stand today with these calculations?